./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.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_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/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_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/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_92128c25-bad3-4f66-833f-f41167cf49d2/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 d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:43:13,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:43:13,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:43:13,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:43:13,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:43:13,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:43:13,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:43:13,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:43:13,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:43:13,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:43:13,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:43:13,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:43:13,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:43:13,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:43:13,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:43:13,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:43:13,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:43:13,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:43:13,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:43:13,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:43:13,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:43:13,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:43:13,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:43:13,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:43:13,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:43:13,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:43:13,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:43:13,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:43:13,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:43:13,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:43:13,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:43:13,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:43:13,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:43:13,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:43:13,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:43:13,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:43:13,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:43:13,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:43:13,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:43:13,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:43:13,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:43:13,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:43:13,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:43:13,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:43:13,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:43:13,467 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:43:13,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:43:13,467 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:43:13,468 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:43:13,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:43:13,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:43:13,468 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:43:13,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:43:13,470 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:43:13,470 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:43:13,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:43:13,470 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:43:13,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:43:13,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:43:13,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:43:13,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:43:13,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:43:13,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:43:13,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:43:13,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:43:13,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:43:13,473 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:43:13,473 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:43:13,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:43:13,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:43:13,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:43:13,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:43:13,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:43:13,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:43:13,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:43:13,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:43:13,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:43:13,478 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:43:13,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:43:13,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:43:13,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:43:13,478 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_92128c25-bad3-4f66-833f-f41167cf49d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2021-11-03 04:43:13,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:43:13,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:43:13,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:43:13,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:43:13,832 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:43:13,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-03 04:43:13,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/8566383fd/8d96f964cf9e4b91aee1b7ceba71e34d/FLAG455c854ad [2021-11-03 04:43:14,602 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:43:14,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-03 04:43:14,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/8566383fd/8d96f964cf9e4b91aee1b7ceba71e34d/FLAG455c854ad [2021-11-03 04:43:14,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/8566383fd/8d96f964cf9e4b91aee1b7ceba71e34d [2021-11-03 04:43:14,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:43:14,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:43:14,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:43:14,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:43:14,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:43:14,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:43:14" (1/1) ... [2021-11-03 04:43:14,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8b4468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:14, skipping insertion in model container [2021-11-03 04:43:14,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:43:14" (1/1) ... [2021-11-03 04:43:14,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:43:14,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:43:15,445 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-03 04:43:15,472 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-03 04:43:15,579 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-03 04:43:15,580 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-03 04:43:15,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:43:15,609 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 04:43:15,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b891d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:15, skipping insertion in model container [2021-11-03 04:43:15,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:43:15,610 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:43:15,612 INFO L168 Benchmark]: Toolchain (without parser) took 834.30 ms. Allocated memory is still 109.1 MB. Free memory was 69.6 MB in the beginning and 69.8 MB in the end (delta: -259.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:43:15,613 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 109.1 MB. Free memory was 82.4 MB in the beginning and 82.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:43:15,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 831.66 ms. Allocated memory is still 109.1 MB. Free memory was 69.4 MB in the beginning and 69.8 MB in the end (delta: -421.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:43:15,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 109.1 MB. Free memory was 82.4 MB in the beginning and 82.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 831.66 ms. Allocated memory is still 109.1 MB. Free memory was 69.4 MB in the beginning and 69.8 MB in the end (delta: -421.2 kB). 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: 990]: 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_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/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_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/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_92128c25-bad3-4f66-833f-f41167cf49d2/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 d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:43:17,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:43:17,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:43:17,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:43:17,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:43:17,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:43:17,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:43:17,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:43:17,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:43:17,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:43:17,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:43:17,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:43:17,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:43:17,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:43:17,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:43:17,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:43:17,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:43:17,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:43:17,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:43:17,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:43:17,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:43:17,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:43:17,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:43:17,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:43:17,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:43:17,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:43:17,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:43:17,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:43:17,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:43:17,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:43:17,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:43:17,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:43:17,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:43:17,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:43:17,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:43:17,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:43:17,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:43:17,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:43:17,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:43:17,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:43:17,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:43:17,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:43:17,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:43:17,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:43:17,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:43:17,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:43:17,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:43:17,948 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:43:17,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:43:17,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:43:17,949 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:43:17,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:43:17,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:43:17,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:43:17,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:43:17,952 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:43:17,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:43:17,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:43:17,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:43:17,953 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:43:17,953 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:43:17,953 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:43:17,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:43:17,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:43:17,954 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:43:17,954 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:43:17,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:43:17,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:43:17,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:43:17,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:43:17,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:43:17,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:43:17,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:43:17,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:43:17,956 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:43:17,957 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:43:17,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:43:17,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:43:17,957 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_92128c25-bad3-4f66-833f-f41167cf49d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2021-11-03 04:43:18,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:43:18,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:43:18,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:43:18,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:43:18,397 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:43:18,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-03 04:43:18,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/253882c86/90fd73649d27434caa67c276c2f47d10/FLAG0a2802b37 [2021-11-03 04:43:19,262 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:43:19,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-03 04:43:19,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/253882c86/90fd73649d27434caa67c276c2f47d10/FLAG0a2802b37 [2021-11-03 04:43:19,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/data/253882c86/90fd73649d27434caa67c276c2f47d10 [2021-11-03 04:43:19,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:43:19,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:43:19,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:43:19,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:43:19,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:43:19,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:43:19" (1/1) ... [2021-11-03 04:43:19,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f651c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:19, skipping insertion in model container [2021-11-03 04:43:19,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:43:19" (1/1) ... [2021-11-03 04:43:19,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:43:19,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:43:20,309 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-03 04:43:20,331 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-03 04:43:20,508 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-03 04:43:20,517 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-03 04:43:20,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:43:20,554 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:43:20,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:43:20,598 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-03 04:43:20,600 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-03 04:43:20,690 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-03 04:43:20,691 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-03 04:43:20,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:43:20,719 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:43:20,763 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-03 04:43:20,767 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-03 04:43:20,824 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-03 04:43:20,825 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-03 04:43:20,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:43:20,907 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:43:20,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20 WrapperNode [2021-11-03 04:43:20,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:43:20,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:43:20,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:43:20,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:43:20,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:43:21,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:43:21,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:43:21,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:43:21,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:43:21,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:43:21,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:43:21,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:43:21,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (1/1) ... [2021-11-03 04:43:21,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:43:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:43:21,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:43:21,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:43:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:43:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:43:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:43:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:43:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:43:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:43:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:43:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:43:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:43:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:43:21,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:43:21,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:43:27,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:43:27,510 INFO L299 CfgBuilder]: Removed 124 assume(true) statements. [2021-11-03 04:43:27,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:43:27 BoogieIcfgContainer [2021-11-03 04:43:27,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:43:27,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:43:27,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:43:27,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:43:27,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:43:19" (1/3) ... [2021-11-03 04:43:27,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a00c7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:43:27, skipping insertion in model container [2021-11-03 04:43:27,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:43:20" (2/3) ... [2021-11-03 04:43:27,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a00c7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:43:27, skipping insertion in model container [2021-11-03 04:43:27,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:43:27" (3/3) ... [2021-11-03 04:43:27,521 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test6-2.i [2021-11-03 04:43:27,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:43:27,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 677 error locations. [2021-11-03 04:43:27,567 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:43:27,573 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 04:43:27,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 677 error locations. [2021-11-03 04:43:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 1373 states, 695 states have (on average 2.20431654676259) internal successors, (1532), 1372 states have internal predecessors, (1532), 0 states have call successors, (0), 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 04:43:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:43:27,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:27,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:43:27,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:43:27,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:27,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046553359] [2021-11-03 04:43:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:27,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:27,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:27,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:43:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:43:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:27,983 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 04:43:28,003 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 04:43:28,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:28,041 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 04:43:28,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:28,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046553359] [2021-11-03 04:43:28,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046553359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:28,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:28,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:43:28,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869896716] [2021-11-03 04:43:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:43:28,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:43:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:43:28,072 INFO L87 Difference]: Start difference. First operand has 1373 states, 695 states have (on average 2.20431654676259) internal successors, (1532), 1372 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:30,779 INFO L93 Difference]: Finished difference Result 1547 states and 1625 transitions. [2021-11-03 04:43:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:43:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:43:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:30,802 INFO L225 Difference]: With dead ends: 1547 [2021-11-03 04:43:30,803 INFO L226 Difference]: Without dead ends: 1545 [2021-11-03 04:43:30,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:43:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-03 04:43:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1345. [2021-11-03 04:43:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 687 states have (on average 2.059679767103348) internal successors, (1415), 1344 states have internal predecessors, (1415), 0 states have call successors, (0), 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 04:43:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1415 transitions. [2021-11-03 04:43:30,906 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1415 transitions. Word has length 3 [2021-11-03 04:43:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:30,906 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 1415 transitions. [2021-11-03 04:43:30,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1415 transitions. [2021-11-03 04:43:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:43:30,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:30,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:43:30,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 04:43:31,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:31,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:43:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:31,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797178734] [2021-11-03 04:43:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:31,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:31,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:31,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:43:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:31,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:31,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:31,266 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 04:43:31,285 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 04:43:31,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:31,345 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 04:43:31,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:31,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797178734] [2021-11-03 04:43:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797178734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:31,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:31,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:43:31,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736668272] [2021-11-03 04:43:31,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:31,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:31,354 INFO L87 Difference]: Start difference. First operand 1345 states and 1415 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:37,055 INFO L93 Difference]: Finished difference Result 2072 states and 2185 transitions. [2021-11-03 04:43:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:43:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:43:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:37,068 INFO L225 Difference]: With dead ends: 2072 [2021-11-03 04:43:37,068 INFO L226 Difference]: Without dead ends: 2072 [2021-11-03 04:43:37,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-11-03 04:43:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1381. [2021-11-03 04:43:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 732 states have (on average 2.0423497267759565) internal successors, (1495), 1380 states have internal predecessors, (1495), 0 states have call successors, (0), 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 04:43:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1495 transitions. [2021-11-03 04:43:37,114 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1495 transitions. Word has length 3 [2021-11-03 04:43:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:37,114 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 1495 transitions. [2021-11-03 04:43:37,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1495 transitions. [2021-11-03 04:43:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:43:37,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:37,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:43:37,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:37,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648752, now seen corresponding path program 1 times [2021-11-03 04:43:37,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:37,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248512217] [2021-11-03 04:43:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:37,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:37,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:37,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:43:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:37,530 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 04:43:37,566 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 04:43:37,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:37,593 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 04:43:37,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:37,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248512217] [2021-11-03 04:43:37,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248512217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:37,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:37,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:43:37,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198971043] [2021-11-03 04:43:37,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:37,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:37,606 INFO L87 Difference]: Start difference. First operand 1381 states and 1495 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:41,105 INFO L93 Difference]: Finished difference Result 1940 states and 2089 transitions. [2021-11-03 04:43:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:43:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:43:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:41,116 INFO L225 Difference]: With dead ends: 1940 [2021-11-03 04:43:41,117 INFO L226 Difference]: Without dead ends: 1940 [2021-11-03 04:43:41,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 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 04:43:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-03 04:43:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1333. [2021-11-03 04:43:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 732 states have (on average 1.9726775956284153) internal successors, (1444), 1332 states have internal predecessors, (1444), 0 states have call successors, (0), 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 04:43:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1444 transitions. [2021-11-03 04:43:41,151 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1444 transitions. Word has length 9 [2021-11-03 04:43:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 1444 transitions. [2021-11-03 04:43:41,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1444 transitions. [2021-11-03 04:43:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:43:41,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:41,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:41,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:41,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:41,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648753, now seen corresponding path program 1 times [2021-11-03 04:43:41,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:41,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496787613] [2021-11-03 04:43:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:41,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:41,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:43:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:43:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:41,570 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 04:43:41,638 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 04:43:41,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:41,795 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 04:43:41,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:41,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496787613] [2021-11-03 04:43:41,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496787613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:41,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:41,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:43:41,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719976754] [2021-11-03 04:43:41,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:43:41,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:43:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:43:41,798 INFO L87 Difference]: Start difference. First operand 1333 states and 1444 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:50,745 INFO L93 Difference]: Finished difference Result 2031 states and 2145 transitions. [2021-11-03 04:43:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:43:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:43:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:50,755 INFO L225 Difference]: With dead ends: 2031 [2021-11-03 04:43:50,755 INFO L226 Difference]: Without dead ends: 2031 [2021-11-03 04:43:50,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:43:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-03 04:43:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1323. [2021-11-03 04:43:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 732 states have (on average 1.9549180327868851) internal successors, (1431), 1322 states have internal predecessors, (1431), 0 states have call successors, (0), 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 04:43:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1431 transitions. [2021-11-03 04:43:50,788 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1431 transitions. Word has length 9 [2021-11-03 04:43:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1431 transitions. [2021-11-03 04:43:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1431 transitions. [2021-11-03 04:43:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:43:50,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:50,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:50,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:51,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:51,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr555ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2075071052, now seen corresponding path program 1 times [2021-11-03 04:43:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:51,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171528297] [2021-11-03 04:43:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:51,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:51,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:51,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:43:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:43:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:51,271 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 04:43:51,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:51,351 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 04:43:51,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:51,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171528297] [2021-11-03 04:43:51,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171528297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:51,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:43:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991036694] [2021-11-03 04:43:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:51,355 INFO L87 Difference]: Start difference. First operand 1323 states and 1431 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:52,237 INFO L93 Difference]: Finished difference Result 2027 states and 2177 transitions. [2021-11-03 04:43:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:43:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:43:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:52,251 INFO L225 Difference]: With dead ends: 2027 [2021-11-03 04:43:52,251 INFO L226 Difference]: Without dead ends: 2027 [2021-11-03 04:43:52,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 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 04:43:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-03 04:43:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1571. [2021-11-03 04:43:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 980 states have (on average 1.9346938775510205) internal successors, (1896), 1570 states have internal predecessors, (1896), 0 states have call successors, (0), 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 04:43:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 1896 transitions. [2021-11-03 04:43:52,289 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 1896 transitions. Word has length 11 [2021-11-03 04:43:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:52,290 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 1896 transitions. [2021-11-03 04:43:52,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 1896 transitions. [2021-11-03 04:43:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:43:52,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:52,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:52,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:52,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:52,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1895000204, now seen corresponding path program 1 times [2021-11-03 04:43:52,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:52,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811812118] [2021-11-03 04:43:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:52,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:52,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:52,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:52,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:43:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:43:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:52,734 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 04:43:52,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:52,767 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 04:43:52,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:52,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811812118] [2021-11-03 04:43:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811812118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:52,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:52,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:43:52,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183183531] [2021-11-03 04:43:52,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:52,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:52,774 INFO L87 Difference]: Start difference. First operand 1571 states and 1896 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:43:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:52,802 INFO L93 Difference]: Finished difference Result 1775 states and 2089 transitions. [2021-11-03 04:43:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:43:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:43:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:52,810 INFO L225 Difference]: With dead ends: 1775 [2021-11-03 04:43:52,810 INFO L226 Difference]: Without dead ends: 1775 [2021-11-03 04:43:52,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-11-03 04:43:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1511. [2021-11-03 04:43:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 944 states have (on average 1.9173728813559323) internal successors, (1810), 1510 states have internal predecessors, (1810), 0 states have call successors, (0), 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 04:43:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1810 transitions. [2021-11-03 04:43:52,842 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1810 transitions. Word has length 13 [2021-11-03 04:43:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:52,843 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 1810 transitions. [2021-11-03 04:43:52,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:43:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1810 transitions. [2021-11-03 04:43:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:43:52,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:52,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:52,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:53,056 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr558ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1278447871, now seen corresponding path program 1 times [2021-11-03 04:43:53,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:53,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071228930] [2021-11-03 04:43:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:53,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:53,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:53,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:43:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:53,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:53,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:53,367 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:43:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:43:53,432 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:43:53,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 04:43:53,465 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 04:43:53,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:53,535 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 04:43:53,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:53,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071228930] [2021-11-03 04:43:53,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071228930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:53,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:53,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:43:53,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606470119] [2021-11-03 04:43:53,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:43:53,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:43:53,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:43:53,537 INFO L87 Difference]: Start difference. First operand 1511 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:43:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:55,597 INFO L93 Difference]: Finished difference Result 2031 states and 2396 transitions. [2021-11-03 04:43:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:43:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:43:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:55,608 INFO L225 Difference]: With dead ends: 2031 [2021-11-03 04:43:55,608 INFO L226 Difference]: Without dead ends: 2031 [2021-11-03 04:43:55,608 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 04:43:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-03 04:43:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1510. [2021-11-03 04:43:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 943 states have (on average 1.91728525980912) internal successors, (1808), 1509 states have internal predecessors, (1808), 0 states have call successors, (0), 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 04:43:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1808 transitions. [2021-11-03 04:43:55,642 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1808 transitions. Word has length 13 [2021-11-03 04:43:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:55,642 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1808 transitions. [2021-11-03 04:43:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:43:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1808 transitions. [2021-11-03 04:43:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:43:55,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:55,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:55,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:55,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:55,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1153072931, now seen corresponding path program 1 times [2021-11-03 04:43:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:55,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376938069] [2021-11-03 04:43:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:55,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:55,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:55,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:43:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:43:56,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:56,141 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 04:43:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:56,179 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 04:43:56,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:56,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376938069] [2021-11-03 04:43:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376938069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:56,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:56,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:43:56,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818271747] [2021-11-03 04:43:56,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:56,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:56,181 INFO L87 Difference]: Start difference. First operand 1510 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 04:43:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:56,202 INFO L93 Difference]: Finished difference Result 1450 states and 1722 transitions. [2021-11-03 04:43:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:43:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 04:43:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:56,210 INFO L225 Difference]: With dead ends: 1450 [2021-11-03 04:43:56,210 INFO L226 Difference]: Without dead ends: 1450 [2021-11-03 04:43:56,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-03 04:43:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1450. [2021-11-03 04:43:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 907 states have (on average 1.898566703417861) internal successors, (1722), 1449 states have internal predecessors, (1722), 0 states have call successors, (0), 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 04:43:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1722 transitions. [2021-11-03 04:43:56,241 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1722 transitions. Word has length 19 [2021-11-03 04:43:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 1722 transitions. [2021-11-03 04:43:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 04:43:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1722 transitions. [2021-11-03 04:43:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 04:43:56,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:56,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:56,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:56,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1529130, now seen corresponding path program 1 times [2021-11-03 04:43:56,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:56,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183740859] [2021-11-03 04:43:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:56,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:56,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:56,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:43:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:56,713 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 04:43:56,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:56,770 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 04:43:56,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:56,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183740859] [2021-11-03 04:43:56,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183740859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:56,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:56,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:43:56,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710285869] [2021-11-03 04:43:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:43:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:43:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:43:56,774 INFO L87 Difference]: Start difference. First operand 1450 states and 1722 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 04:43:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:56,843 INFO L93 Difference]: Finished difference Result 1422 states and 1666 transitions. [2021-11-03 04:43:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:43:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 21 [2021-11-03 04:43:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:56,849 INFO L225 Difference]: With dead ends: 1422 [2021-11-03 04:43:56,849 INFO L226 Difference]: Without dead ends: 1422 [2021-11-03 04:43:56,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:43:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-11-03 04:43:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1420. [2021-11-03 04:43:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 891 states have (on average 1.8675645342312008) internal successors, (1664), 1419 states have internal predecessors, (1664), 0 states have call successors, (0), 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 04:43:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1664 transitions. [2021-11-03 04:43:56,873 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1664 transitions. Word has length 21 [2021-11-03 04:43:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:56,874 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1664 transitions. [2021-11-03 04:43:56,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 04:43:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1664 transitions. [2021-11-03 04:43:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:43:56,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:56,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:56,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:57,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:43:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash 270814884, now seen corresponding path program 1 times [2021-11-03 04:43:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:57,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72584799] [2021-11-03 04:43:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:57,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:57,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:57,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:43:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:43:57,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:57,332 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 04:43:57,478 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 04:43:57,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:57,617 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 04:43:57,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:57,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72584799] [2021-11-03 04:43:57,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72584799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:57,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:43:57,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832799265] [2021-11-03 04:43:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:43:57,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:43:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:43:57,619 INFO L87 Difference]: Start difference. First operand 1420 states and 1664 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:00,494 INFO L93 Difference]: Finished difference Result 2068 states and 2441 transitions. [2021-11-03 04:44:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:44:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 04:44:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:00,505 INFO L225 Difference]: With dead ends: 2068 [2021-11-03 04:44:00,505 INFO L226 Difference]: Without dead ends: 2068 [2021-11-03 04:44:00,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:44:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-11-03 04:44:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1416. [2021-11-03 04:44:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 891 states have (on average 1.8585858585858586) internal successors, (1656), 1415 states have internal predecessors, (1656), 0 states have call successors, (0), 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 04:44:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1656 transitions. [2021-11-03 04:44:00,533 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1656 transitions. Word has length 35 [2021-11-03 04:44:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:00,534 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 1656 transitions. [2021-11-03 04:44:00,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1656 transitions. [2021-11-03 04:44:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:44:00,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:00,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:00,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:00,748 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:44:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 270814885, now seen corresponding path program 1 times [2021-11-03 04:44:00,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:00,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800125146] [2021-11-03 04:44:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:00,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:00,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:00,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:44:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:44:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:01,005 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 04:44:01,344 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 04:44:01,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:01,940 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 04:44:01,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800125146] [2021-11-03 04:44:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800125146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:01,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:01,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:44:01,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27651816] [2021-11-03 04:44:01,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:44:01,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:44:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:44:01,943 INFO L87 Difference]: Start difference. First operand 1416 states and 1656 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 04:44:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:11,609 INFO L93 Difference]: Finished difference Result 2238 states and 2613 transitions. [2021-11-03 04:44:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:44:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 04:44:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:11,620 INFO L225 Difference]: With dead ends: 2238 [2021-11-03 04:44:11,620 INFO L226 Difference]: Without dead ends: 2238 [2021-11-03 04:44:11,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:44:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-03 04:44:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1412. [2021-11-03 04:44:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 891 states have (on average 1.8496071829405163) internal successors, (1648), 1411 states have internal predecessors, (1648), 0 states have call successors, (0), 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 04:44:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1648 transitions. [2021-11-03 04:44:11,648 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1648 transitions. Word has length 35 [2021-11-03 04:44:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:11,649 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1648 transitions. [2021-11-03 04:44:11,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 04:44:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1648 transitions. [2021-11-03 04:44:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:44:11,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:11,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:11,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:11,865 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:44:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1615578914, now seen corresponding path program 1 times [2021-11-03 04:44:11,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:11,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059102697] [2021-11-03 04:44:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:11,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:11,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:11,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:11,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:44:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:44:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:12,339 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 04:44:12,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:12,509 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 04:44:12,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059102697] [2021-11-03 04:44:12,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059102697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:12,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:12,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:44:12,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311265021] [2021-11-03 04:44:12,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:44:12,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:44:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:12,512 INFO L87 Difference]: Start difference. First operand 1412 states and 1648 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 04:44:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:12,572 INFO L93 Difference]: Finished difference Result 1400 states and 1628 transitions. [2021-11-03 04:44:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:44:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-03 04:44:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:12,580 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 04:44:12,580 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 04:44:12,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 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 04:44:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 04:44:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2021-11-03 04:44:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 879 states have (on average 1.852104664391354) internal successors, (1628), 1399 states have internal predecessors, (1628), 0 states have call successors, (0), 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 04:44:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1628 transitions. [2021-11-03 04:44:12,601 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1628 transitions. Word has length 53 [2021-11-03 04:44:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1628 transitions. [2021-11-03 04:44:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 04:44:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1628 transitions. [2021-11-03 04:44:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:44:12,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:12,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:12,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:12,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:12,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:44:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136622, now seen corresponding path program 1 times [2021-11-03 04:44:12,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:12,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192153583] [2021-11-03 04:44:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:12,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:12,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:12,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:12,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:44:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:44:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:13,451 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-03 04:44:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-03 04:44:13,636 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 04:44:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-03 04:44:13,743 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-03 04:44:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2021-11-03 04:44:14,203 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 04:44:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:14,588 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 04:44:14,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:14,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192153583] [2021-11-03 04:44:14,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192153583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:14,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:14,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:44:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957653623] [2021-11-03 04:44:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:44:14,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:44:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:44:14,590 INFO L87 Difference]: Start difference. First operand 1400 states and 1628 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:20,873 INFO L93 Difference]: Finished difference Result 3217 states and 3731 transitions. [2021-11-03 04:44:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:44:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 04:44:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:20,887 INFO L225 Difference]: With dead ends: 3217 [2021-11-03 04:44:20,887 INFO L226 Difference]: Without dead ends: 3217 [2021-11-03 04:44:20,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:44:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-11-03 04:44:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1668. [2021-11-03 04:44:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1149 states have (on average 1.8120104438642297) internal successors, (2082), 1667 states have internal predecessors, (2082), 0 states have call successors, (0), 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 04:44:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2082 transitions. [2021-11-03 04:44:20,917 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2082 transitions. Word has length 61 [2021-11-03 04:44:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2082 transitions. [2021-11-03 04:44:20,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2082 transitions. [2021-11-03 04:44:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:44:20,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:20,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:20,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 04:44:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:21,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:44:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136623, now seen corresponding path program 1 times [2021-11-03 04:44:21,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:21,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060933490] [2021-11-03 04:44:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:21,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:21,137 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:44:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:44:21,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:21,725 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-03 04:44:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 49 [2021-11-03 04:44:21,771 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-03 04:44:21,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 63 [2021-11-03 04:44:22,003 INFO L354 Elim1Store]: treesize reduction -2, result has 108.0 percent of original size [2021-11-03 04:44:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 64 [2021-11-03 04:44:22,051 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-03 04:44:22,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 65 [2021-11-03 04:44:22,509 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-03 04:44:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-11-03 04:44:28,450 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 04:44:28,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:30,961 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 04:44:30,961 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:30,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060933490] [2021-11-03 04:44:30,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060933490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:30,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:30,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 9 [2021-11-03 04:44:30,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616894194] [2021-11-03 04:44:30,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 04:44:30,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 04:44:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:44:30,963 INFO L87 Difference]: Start difference. First operand 1668 states and 2082 transitions. Second operand has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 04:45:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:00,016 INFO L93 Difference]: Finished difference Result 1678 states and 2093 transitions. [2021-11-03 04:45:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 61 [2021-11-03 04:45:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:00,025 INFO L225 Difference]: With dead ends: 1678 [2021-11-03 04:45:00,025 INFO L226 Difference]: Without dead ends: 1678 [2021-11-03 04:45:00,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:45:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-03 04:45:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1672. [2021-11-03 04:45:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1153 states have (on average 1.8091934084995664) internal successors, (2086), 1671 states have internal predecessors, (2086), 0 states have call successors, (0), 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 04:45:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2086 transitions. [2021-11-03 04:45:00,047 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2086 transitions. Word has length 61 [2021-11-03 04:45:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:00,048 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2086 transitions. [2021-11-03 04:45:00,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 04:45:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2086 transitions. [2021-11-03 04:45:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:45:00,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:00,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:00,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:00,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:00,260 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr72ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1137699215, now seen corresponding path program 1 times [2021-11-03 04:45:00,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:00,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197441099] [2021-11-03 04:45:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:00,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:00,263 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:45:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:45:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:00,921 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 04:45:00,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:01,032 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 04:45:01,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:01,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197441099] [2021-11-03 04:45:01,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197441099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:01,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:01,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:45:01,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404427561] [2021-11-03 04:45:01,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:45:01,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:45:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:45:01,034 INFO L87 Difference]: Start difference. First operand 1672 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:01,429 INFO L93 Difference]: Finished difference Result 4334 states and 5506 transitions. [2021-11-03 04:45:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:45:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-03 04:45:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:01,457 INFO L225 Difference]: With dead ends: 4334 [2021-11-03 04:45:01,457 INFO L226 Difference]: Without dead ends: 4334 [2021-11-03 04:45:01,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2021-11-03 04:45:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 1670. [2021-11-03 04:45:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1152 states have (on average 1.8090277777777777) internal successors, (2084), 1669 states have internal predecessors, (2084), 0 states have call successors, (0), 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 04:45:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2084 transitions. [2021-11-03 04:45:01,499 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2084 transitions. Word has length 65 [2021-11-03 04:45:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:01,500 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2084 transitions. [2021-11-03 04:45:01,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2084 transitions. [2021-11-03 04:45:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:45:01,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:01,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:01,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:01,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:01,716 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash -908630116, now seen corresponding path program 1 times [2021-11-03 04:45:01,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:01,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096560511] [2021-11-03 04:45:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:01,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:01,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:01,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:45:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:45:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:02,515 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 04:45:02,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:02,715 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 04:45:02,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:02,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096560511] [2021-11-03 04:45:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096560511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:02,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:02,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:45:02,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214494799] [2021-11-03 04:45:02,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:45:02,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:45:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:45:02,717 INFO L87 Difference]: Start difference. First operand 1670 states and 2084 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 04:45:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:02,831 INFO L93 Difference]: Finished difference Result 3990 states and 4925 transitions. [2021-11-03 04:45:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:45:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-03 04:45:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:02,836 INFO L225 Difference]: With dead ends: 3990 [2021-11-03 04:45:02,837 INFO L226 Difference]: Without dead ends: 3990 [2021-11-03 04:45:02,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:45:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-11-03 04:45:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 1926. [2021-11-03 04:45:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1408 states have (on average 1.8082386363636365) internal successors, (2546), 1925 states have internal predecessors, (2546), 0 states have call successors, (0), 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 04:45:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2546 transitions. [2021-11-03 04:45:02,866 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2546 transitions. Word has length 66 [2021-11-03 04:45:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:02,866 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2546 transitions. [2021-11-03 04:45:02,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 04:45:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2546 transitions. [2021-11-03 04:45:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:45:02,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:02,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:02,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:03,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:03,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1887851608, now seen corresponding path program 1 times [2021-11-03 04:45:03,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:03,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563637636] [2021-11-03 04:45:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:03,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:03,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:03,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:45:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:45:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:03,783 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 04:45:03,791 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 04:45:04,635 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:45:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-03 04:45:04,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:45:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-03 04:45:04,669 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 04:45:04,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:09,429 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 04:45:09,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:09,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563637636] [2021-11-03 04:45:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563637636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:09,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:09,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:45:09,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737834135] [2021-11-03 04:45:09,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:09,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-03 04:45:09,432 INFO L87 Difference]: Start difference. First operand 1926 states and 2546 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:17,149 INFO L93 Difference]: Finished difference Result 2533 states and 3261 transitions. [2021-11-03 04:45:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:45:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 04:45:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:17,153 INFO L225 Difference]: With dead ends: 2533 [2021-11-03 04:45:17,153 INFO L226 Difference]: Without dead ends: 2533 [2021-11-03 04:45:17,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=33, Invalid=56, Unknown=1, NotChecked=0, Total=90 [2021-11-03 04:45:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-11-03 04:45:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1887. [2021-11-03 04:45:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1408 states have (on average 1.7620738636363635) internal successors, (2481), 1886 states have internal predecessors, (2481), 0 states have call successors, (0), 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 04:45:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2481 transitions. [2021-11-03 04:45:17,181 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2481 transitions. Word has length 67 [2021-11-03 04:45:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:17,182 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2481 transitions. [2021-11-03 04:45:17,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2481 transitions. [2021-11-03 04:45:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:45:17,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:17,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:17,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:17,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:17,396 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash -322193671, now seen corresponding path program 1 times [2021-11-03 04:45:17,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:17,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83553292] [2021-11-03 04:45:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:17,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:17,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:17,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:45:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:45:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:18,225 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 04:45:18,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 04:45:18,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:45:18,306 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 04:45:18,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:18,454 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 04:45:18,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:18,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83553292] [2021-11-03 04:45:18,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83553292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:18,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:18,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 04:45:18,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119357119] [2021-11-03 04:45:18,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:18,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:18,457 INFO L87 Difference]: Start difference. First operand 1887 states and 2481 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 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 04:45:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:24,003 INFO L93 Difference]: Finished difference Result 2487 states and 3044 transitions. [2021-11-03 04:45:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:45:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 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) Word has length 73 [2021-11-03 04:45:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:24,007 INFO L225 Difference]: With dead ends: 2487 [2021-11-03 04:45:24,007 INFO L226 Difference]: Without dead ends: 2487 [2021-11-03 04:45:24,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:45:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-11-03 04:45:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1886. [2021-11-03 04:45:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1408 states have (on average 1.7613636363636365) internal successors, (2480), 1885 states have internal predecessors, (2480), 0 states have call successors, (0), 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 04:45:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2480 transitions. [2021-11-03 04:45:24,032 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2480 transitions. Word has length 73 [2021-11-03 04:45:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:24,032 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 2480 transitions. [2021-11-03 04:45:24,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 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 04:45:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2480 transitions. [2021-11-03 04:45:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:45:24,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:24,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:24,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:45:24,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:24,252 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1398068850, now seen corresponding path program 1 times [2021-11-03 04:45:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:24,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682852107] [2021-11-03 04:45:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:24,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:24,254 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:24,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:45:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:45:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:25,065 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 04:45:25,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:45:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:45:25,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:45:25,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:45:25,267 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 04:45:25,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:25,857 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 04:45:25,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:25,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682852107] [2021-11-03 04:45:25,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682852107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:25,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:25,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-03 04:45:25,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470156451] [2021-11-03 04:45:25,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 04:45:25,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 04:45:25,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:45:25,860 INFO L87 Difference]: Start difference. First operand 1886 states and 2480 transitions. Second operand has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 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 04:45:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:55,732 INFO L93 Difference]: Finished difference Result 4418 states and 5558 transitions. [2021-11-03 04:45:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:45:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 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 74 [2021-11-03 04:45:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:55,740 INFO L225 Difference]: With dead ends: 4418 [2021-11-03 04:45:55,741 INFO L226 Difference]: Without dead ends: 4418 [2021-11-03 04:45:55,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:45:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-11-03 04:45:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 1885. [2021-11-03 04:45:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1408 states have (on average 1.7606534090909092) internal successors, (2479), 1884 states have internal predecessors, (2479), 0 states have call successors, (0), 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 04:45:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2479 transitions. [2021-11-03 04:45:55,771 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2479 transitions. Word has length 74 [2021-11-03 04:45:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:55,771 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 2479 transitions. [2021-11-03 04:45:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 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 04:45:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2479 transitions. [2021-11-03 04:45:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:45:55,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:55,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:55,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:55,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:55,988 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:55,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2080731706, now seen corresponding path program 1 times [2021-11-03 04:45:55,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:55,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063402722] [2021-11-03 04:45:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:55,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:55,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:55,991 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:56,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:45:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:56,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:45:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:57,037 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 04:45:57,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:57,193 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 04:45:57,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:57,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063402722] [2021-11-03 04:45:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063402722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:57,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:45:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72710568] [2021-11-03 04:45:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:45:57,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:45:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:45:57,196 INFO L87 Difference]: Start difference. First operand 1885 states and 2479 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 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 04:45:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:57,364 INFO L93 Difference]: Finished difference Result 2749 states and 3464 transitions. [2021-11-03 04:45:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:45:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 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 79 [2021-11-03 04:45:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:57,368 INFO L225 Difference]: With dead ends: 2749 [2021-11-03 04:45:57,368 INFO L226 Difference]: Without dead ends: 2749 [2021-11-03 04:45:57,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-11-03 04:45:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1888. [2021-11-03 04:45:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1411 states have (on average 1.7590361445783131) internal successors, (2482), 1887 states have internal predecessors, (2482), 0 states have call successors, (0), 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 04:45:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2482 transitions. [2021-11-03 04:45:57,387 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2482 transitions. Word has length 79 [2021-11-03 04:45:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 2482 transitions. [2021-11-03 04:45:57,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 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 04:45:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2482 transitions. [2021-11-03 04:45:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 04:45:57,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:57,388 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:57,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:57,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:57,589 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:45:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash -21710874, now seen corresponding path program 1 times [2021-11-03 04:45:57,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:57,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671217527] [2021-11-03 04:45:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:57,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:57,591 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:57,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:45:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:45:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:58,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:58,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:58,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671217527] [2021-11-03 04:45:58,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671217527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:45:58,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1500910661] [2021-11-03 04:45:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:58,729 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:45:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:45:58,737 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:45:58,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:45:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:45:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:00,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:00,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1500910661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:46:00,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420604890] [2021-11-03 04:46:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:46:00,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:46:00,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:46:00,176 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:46:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 04:46:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:46:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:46:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:01,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:01,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420604890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:46:01,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:46:01,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:46:01,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240314231] [2021-11-03 04:46:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:46:01,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:46:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:46:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:46:01,594 INFO L87 Difference]: Start difference. First operand 1888 states and 2482 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 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 04:46:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:46:02,002 INFO L93 Difference]: Finished difference Result 2755 states and 3470 transitions. [2021-11-03 04:46:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:46:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 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 81 [2021-11-03 04:46:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:46:02,006 INFO L225 Difference]: With dead ends: 2755 [2021-11-03 04:46:02,006 INFO L226 Difference]: Without dead ends: 2755 [2021-11-03 04:46:02,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:46:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-03 04:46:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1894. [2021-11-03 04:46:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1417 states have (on average 1.7558221594918844) internal successors, (2488), 1893 states have internal predecessors, (2488), 0 states have call successors, (0), 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 04:46:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2488 transitions. [2021-11-03 04:46:02,033 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2488 transitions. Word has length 81 [2021-11-03 04:46:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:46:02,033 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 2488 transitions. [2021-11-03 04:46:02,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 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 04:46:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2488 transitions. [2021-11-03 04:46:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:46:02,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:46:02,034 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:46:02,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 04:46:02,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:46:02,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:46:02,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:46:02,651 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:46:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:46:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1830489050, now seen corresponding path program 2 times [2021-11-03 04:46:02,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:46:02,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432513262] [2021-11-03 04:46:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:46:02,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:46:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:46:02,653 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:46:02,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:46:03,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:46:03,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:46:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:46:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:04,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:04,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:46:04,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432513262] [2021-11-03 04:46:04,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432513262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:46:04,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389344414] [2021-11-03 04:46:04,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:46:04,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:46:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:46:04,489 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:46:04,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 04:46:06,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:46:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:46:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:46:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:06,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:46:06,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389344414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:46:06,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513462610] [2021-11-03 04:46:06,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:46:06,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:46:06,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:46:06,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:46:06,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 04:46:53,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:46:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:46:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:46:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:54,101 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:46:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-03 04:46:54,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 04:46:54,398 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 04:46:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-03 04:46:54,554 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:46:54,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 04:46:55,568 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:46:55,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 04:46:55,717 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:46:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 04:46:58,082 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:46:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 04:46:58,241 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:46:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 48 [2021-11-03 04:46:59,182 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 04:46:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-03 04:46:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 04:46:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:47:33,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))))))))))) (_ bv1 1)))) is different from false [2021-11-03 04:47:35,396 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_70| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_70| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))) (_ bv1 1)))) is different from false [2021-11-03 04:47:58,896 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-03 04:47:58,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2021-11-03 04:48:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 6 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-03 04:48:25,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513462610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:48:25,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:48:25,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 15] total 41 [2021-11-03 04:48:25,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932659646] [2021-11-03 04:48:25,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-03 04:48:25,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:48:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-03 04:48:25,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1273, Unknown=35, NotChecked=150, Total=1640 [2021-11-03 04:48:25,875 INFO L87 Difference]: Start difference. First operand 1894 states and 2488 transitions. Second operand has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 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 04:51:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:00,749 INFO L93 Difference]: Finished difference Result 4970 states and 6242 transitions. [2021-11-03 04:51:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-03 04:51:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 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 85 [2021-11-03 04:51:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:00,758 INFO L225 Difference]: With dead ends: 4970 [2021-11-03 04:51:00,759 INFO L226 Difference]: Without dead ends: 4970 [2021-11-03 04:51:00,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 463 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 122.8s TimeCoverageRelationStatistics Valid=1421, Invalid=5515, Unknown=44, NotChecked=330, Total=7310 [2021-11-03 04:51:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-03 04:51:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 1905. [2021-11-03 04:51:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1429 states have (on average 1.748775367389783) internal successors, (2499), 1904 states have internal predecessors, (2499), 0 states have call successors, (0), 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 04:51:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2499 transitions. [2021-11-03 04:51:00,801 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2499 transitions. Word has length 85 [2021-11-03 04:51:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:00,802 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 2499 transitions. [2021-11-03 04:51:00,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 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 04:51:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2499 transitions. [2021-11-03 04:51:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 04:51:00,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:00,804 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:00,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:01,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-03 04:51:01,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-03 04:51:01,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:01,420 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:51:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1600982183, now seen corresponding path program 1 times [2021-11-03 04:51:01,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:01,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386801108] [2021-11-03 04:51:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:01,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:01,423 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:01,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:51:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:51:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:03,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:04,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:04,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386801108] [2021-11-03 04:51:04,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386801108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:04,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993981295] [2021-11-03 04:51:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:04,306 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:04,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:51:04,312 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:51:04,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 04:51:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:05,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:51:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:06,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:06,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [993981295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:06,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330328223] [2021-11-03 04:51:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:06,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:06,228 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:06,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 04:51:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:51:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330328223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:07,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:51:07,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 04:51:07,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116209850] [2021-11-03 04:51:07,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 04:51:07,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 04:51:07,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 04:51:07,898 INFO L87 Difference]: Start difference. First operand 1905 states and 2499 transitions. Second operand has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 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 04:51:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:20,746 INFO L93 Difference]: Finished difference Result 2790 states and 3505 transitions. [2021-11-03 04:51:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 04:51:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 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 93 [2021-11-03 04:51:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:20,753 INFO L225 Difference]: With dead ends: 2790 [2021-11-03 04:51:20,753 INFO L226 Difference]: Without dead ends: 2790 [2021-11-03 04:51:20,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 04:51:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2021-11-03 04:51:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1929. [2021-11-03 04:51:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1453 states have (on average 1.7364074328974535) internal successors, (2523), 1928 states have internal predecessors, (2523), 0 states have call successors, (0), 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 04:51:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2523 transitions. [2021-11-03 04:51:20,778 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2523 transitions. Word has length 93 [2021-11-03 04:51:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:20,779 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 2523 transitions. [2021-11-03 04:51:20,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 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 04:51:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2523 transitions. [2021-11-03 04:51:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 04:51:20,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:20,780 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:20,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:21,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:21,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:21,388 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 04:51:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1361330777, now seen corresponding path program 2 times [2021-11-03 04:51:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:21,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577832362] [2021-11-03 04:51:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:51:21,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:21,390 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:21,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-03 04:51:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:51:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:51:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 04:51:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:24,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:27,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:27,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577832362] [2021-11-03 04:51:27,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577832362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:27,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192891169] [2021-11-03 04:51:27,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:51:27,913 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:51:27,914 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:51:27,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-03 04:51:30,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:51:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:51:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 04:51:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:30,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1192891169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:30,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149320316] [2021-11-03 04:51:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:51:30,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:30,853 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:30,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92128c25-bad3-4f66-833f-f41167cf49d2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-03 04:52:56,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:52:56,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:52:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-03 04:52:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:56,840 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:52:56,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-03 04:52:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:52:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:52:57,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-03 04:52:57,922 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 04:52:57,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-03 04:52:57,949 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 04:52:57,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-03 04:52:58,267 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:52:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:52:58,296 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:52:58,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:52:58,643 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:52:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:52:58,672 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:52:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:00,725 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:00,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:00,755 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:00,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:01,111 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:01,149 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:01,528 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:01,567 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:04,183 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:04,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:05,407 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:05,837 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:05,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:05,869 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:05,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:06,211 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:06,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:10,560 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:14,091 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:14,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:15,067 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:22,210 WARN L207 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 20 DAG size of output: 9 [2021-11-03 04:53:22,210 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:23,644 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:23,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:27,733 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:29,003 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:29,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:31,027 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:31,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:32,036 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:32,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:34,144 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:34,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:34,171 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:34,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:36,398 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:37,974 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:37,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:38,302 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:38,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:39,829 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:40,193 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:40,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:40,221 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:40,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:40,573 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:40,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:40,601 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:41,887 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:43,323 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:45,499 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:46,597 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:49,270 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:49,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:49,299 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:49,659 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:49,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:51,006 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:53,325 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:53,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:53,353 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:54,762 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:54,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:56,140 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:56,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:56,474 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:56,511 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:53:56,847 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:53:56,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:53:58,727 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:53:58,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:54:01,788 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:54:01,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:54:01,814 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:54:01,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:54:03,460 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:54:03,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:54:05,892 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:54:05,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:54:06,220 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-03 04:54:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:54:07,806 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:54:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-03 04:54:08,165 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:54:08,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-03 04:54:08,213 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 04:54:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-03 04:54:10,834 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 04:54:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-03 04:54:10,843 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 04:54:10,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-03 04:54:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-03 04:54:10,970 INFO L328 TraceCheckSpWp]: Computing backward predicates...