./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:55:28,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:55:28,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:55:28,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:55:28,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:55:28,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:55:28,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:55:28,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:55:28,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:55:28,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:55:28,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:55:28,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:55:28,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:55:28,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:55:28,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:55:28,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:55:28,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:55:28,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:55:28,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:55:28,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:55:28,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:55:28,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:55:28,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:55:28,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:55:28,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:55:28,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:55:28,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:55:28,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:55:28,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:55:28,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:55:28,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:55:28,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:55:28,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:55:28,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:55:28,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:55:28,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:55:28,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:55:28,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:55:28,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:55:28,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:55:28,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:55:28,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:55:28,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:55:28,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:55:28,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:55:28,727 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:55:28,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:55:28,727 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:55:28,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:55:28,728 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:55:28,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:55:28,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:55:28,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:55:28,730 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:55:28,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:55:28,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:55:28,730 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:55:28,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:55:28,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:55:28,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:55:28,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:55:28,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:55:28,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:55:28,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:55:28,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:55:28,733 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:55:28,733 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:55:28,734 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:55:28,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:55:28,734 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:55:28,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:55:28,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:55:28,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:55:28,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:55:28,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:55:28,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:55:28,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:55:28,736 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:55:28,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:55:28,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:55:28,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:55:28,741 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2021-11-03 03:55:29,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:55:29,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:55:29,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:55:29,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:55:29,062 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:55:29,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-03 03:55:29,155 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/e61c2dc7e/ac9318b27420420fb62fe070d2bfd06c/FLAGd47a89dcb [2021-11-03 03:55:29,728 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:55:29,728 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-03 03:55:29,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/e61c2dc7e/ac9318b27420420fb62fe070d2bfd06c/FLAGd47a89dcb [2021-11-03 03:55:29,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/e61c2dc7e/ac9318b27420420fb62fe070d2bfd06c [2021-11-03 03:55:29,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:55:29,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:55:29,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:55:29,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:55:29,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:55:29,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:29" (1/1) ... [2021-11-03 03:55:29,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f942f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:29, skipping insertion in model container [2021-11-03 03:55:29,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:29" (1/1) ... [2021-11-03 03:55:29,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:55:30,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:55:30,581 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-03 03:55:30,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:55:30,809 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 03:55:30,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6eb7930c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:30, skipping insertion in model container [2021-11-03 03:55:30,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:55:30,810 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:55:30,813 INFO L168 Benchmark]: Toolchain (without parser) took 862.39 ms. Allocated memory is still 100.7 MB. Free memory was 59.6 MB in the beginning and 63.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-11-03 03:55:30,814 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 78.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:55:30,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 855.46 ms. Allocated memory is still 100.7 MB. Free memory was 59.5 MB in the beginning and 63.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-11-03 03:55:30,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 78.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 855.46 ms. Allocated memory is still 100.7 MB. Free memory was 59.5 MB in the beginning and 63.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:55:33,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:55:33,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:55:33,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:55:33,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:55:33,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:55:33,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:55:33,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:55:33,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:55:33,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:55:33,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:55:33,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:55:33,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:55:33,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:55:33,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:55:33,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:55:33,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:55:33,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:55:33,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:55:33,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:55:33,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:55:33,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:55:33,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:55:33,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:55:33,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:55:33,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:55:33,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:55:33,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:55:33,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:55:33,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:55:33,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:55:33,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:55:33,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:55:33,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:55:33,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:55:33,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:55:33,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:55:33,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:55:33,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:55:33,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:55:33,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:55:33,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:55:33,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:55:33,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:55:33,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:55:33,308 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:55:33,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:55:33,308 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:55:33,309 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:55:33,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:55:33,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:55:33,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:55:33,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:55:33,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:55:33,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:55:33,311 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:55:33,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:55:33,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:55:33,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:55:33,312 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:55:33,312 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:55:33,312 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:55:33,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:55:33,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:55:33,313 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:55:33,313 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:55:33,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:55:33,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:55:33,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:55:33,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:55:33,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:55:33,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:55:33,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:55:33,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:55:33,315 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:55:33,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:55:33,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:55:33,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:55:33,316 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2021-11-03 03:55:33,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:55:33,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:55:33,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:55:33,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:55:33,755 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:55:33,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-03 03:55:33,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/8ee921138/10d6970fa8974b7d9528fa3e923929ff/FLAG94e47cbe9 [2021-11-03 03:55:34,542 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:55:34,542 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-03 03:55:34,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/8ee921138/10d6970fa8974b7d9528fa3e923929ff/FLAG94e47cbe9 [2021-11-03 03:55:34,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/data/8ee921138/10d6970fa8974b7d9528fa3e923929ff [2021-11-03 03:55:34,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:55:34,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:55:34,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:55:34,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:55:34,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:55:34,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:34" (1/1) ... [2021-11-03 03:55:34,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7942f2f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:34, skipping insertion in model container [2021-11-03 03:55:34,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:34" (1/1) ... [2021-11-03 03:55:34,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:55:34,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:55:35,469 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-03 03:55:35,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:55:35,708 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:55:35,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:55:35,747 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-03 03:55:35,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:55:35,932 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:55:35,962 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_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-03 03:55:36,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:55:36,138 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:55:36,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36 WrapperNode [2021-11-03 03:55:36,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:55:36,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:55:36,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:55:36,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:55:36,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:55:36,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:55:36,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:55:36,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:55:36,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:55:36,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:55:36,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:55:36,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:55:36,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (1/1) ... [2021-11-03 03:55:36,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:55:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:55:36,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:55:36,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:55:36,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:55:36,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:55:36,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:55:36,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:55:36,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:55:36,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:55:36,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:55:36,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:55:36,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:55:36,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:55:36,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:55:44,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:55:44,160 INFO L299 CfgBuilder]: Removed 115 assume(true) statements. [2021-11-03 03:55:44,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:44 BoogieIcfgContainer [2021-11-03 03:55:44,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:55:44,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:55:44,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:55:44,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:55:44,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:55:34" (1/3) ... [2021-11-03 03:55:44,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff1c11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:44, skipping insertion in model container [2021-11-03 03:55:44,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:36" (2/3) ... [2021-11-03 03:55:44,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff1c11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:44, skipping insertion in model container [2021-11-03 03:55:44,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:44" (3/3) ... [2021-11-03 03:55:44,174 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-3.i [2021-11-03 03:55:44,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:55:44,181 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 860 error locations. [2021-11-03 03:55:44,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:55:44,238 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 03:55:44,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 860 error locations. [2021-11-03 03:55:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 1678 states, 817 states have (on average 2.2717258261933906) internal successors, (1856), 1677 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 03:55:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:55:44,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:44,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:55:44,311 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 03:55:44,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:44,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285127490] [2021-11-03 03:55:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:44,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:44,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:44,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:44,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:55:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:55:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:44,600 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 03:55:44,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:44,612 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 03:55:44,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:44,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285127490] [2021-11-03 03:55:44,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285127490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:44,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:44,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:55:44,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964664402] [2021-11-03 03:55:44,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:55:44,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:55:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:55:44,673 INFO L87 Difference]: Start difference. First operand has 1678 states, 817 states have (on average 2.2717258261933906) internal successors, (1856), 1677 states have internal predecessors, (1856), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:44,812 INFO L93 Difference]: Finished difference Result 1660 states and 1744 transitions. [2021-11-03 03:55:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:55:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 03:55:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:44,843 INFO L225 Difference]: With dead ends: 1660 [2021-11-03 03:55:44,844 INFO L226 Difference]: Without dead ends: 1658 [2021-11-03 03:55:44,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:55:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-11-03 03:55:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2021-11-03 03:55:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 808 states have (on average 2.155940594059406) internal successors, (1742), 1657 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states 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 03:55:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1742 transitions. [2021-11-03 03:55:45,016 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1742 transitions. Word has length 5 [2021-11-03 03:55:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:45,016 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 1742 transitions. [2021-11-03 03:55:45,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1742 transitions. [2021-11-03 03:55:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:55:45,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:45,018 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:55:45,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:55:45,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:45,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 03:55:45,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:45,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190376813] [2021-11-03 03:55:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:45,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:45,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:45,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:55:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:55:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:45,516 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 03:55:45,533 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 03:55:45,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:45,566 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 03:55:45,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:45,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190376813] [2021-11-03 03:55:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190376813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:45,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:45,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:55:45,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616228888] [2021-11-03 03:55:45,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:45,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:45,577 INFO L87 Difference]: Start difference. First operand 1658 states and 1742 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 03:55:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:49,142 INFO L93 Difference]: Finished difference Result 1695 states and 1792 transitions. [2021-11-03 03:55:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 03:55:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:49,157 INFO L225 Difference]: With dead ends: 1695 [2021-11-03 03:55:49,158 INFO L226 Difference]: Without dead ends: 1695 [2021-11-03 03:55:49,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 03:55:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-11-03 03:55:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1641. [2021-11-03 03:55:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 884 states have (on average 2.018099547511312) internal successors, (1784), 1640 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 03:55:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1784 transitions. [2021-11-03 03:55:49,201 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1784 transitions. Word has length 5 [2021-11-03 03:55:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:49,201 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 1784 transitions. [2021-11-03 03:55:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 03:55:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1784 transitions. [2021-11-03 03:55:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:55:49,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:49,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:55:49,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:55:49,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:49,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 03:55:49,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:49,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3831009] [2021-11-03 03:55:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:49,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:49,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:49,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:55:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:55:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:49,619 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 03:55:49,645 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 03:55:49,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:49,719 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 03:55:49,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:49,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3831009] [2021-11-03 03:55:49,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3831009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:49,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:49,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:55:49,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96593924] [2021-11-03 03:55:49,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:55:49,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:49,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:55:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:55:49,722 INFO L87 Difference]: Start difference. First operand 1641 states and 1784 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:57,614 INFO L93 Difference]: Finished difference Result 1998 states and 2162 transitions. [2021-11-03 03:55:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:55:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 03:55:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:57,625 INFO L225 Difference]: With dead ends: 1998 [2021-11-03 03:55:57,625 INFO L226 Difference]: Without dead ends: 1998 [2021-11-03 03:55:57,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 03:55:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-11-03 03:55:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1797. [2021-11-03 03:55:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1050 states have (on average 1.9904761904761905) internal successors, (2090), 1796 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 03:55:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2090 transitions. [2021-11-03 03:55:57,670 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2090 transitions. Word has length 5 [2021-11-03 03:55:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 2090 transitions. [2021-11-03 03:55:57,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2090 transitions. [2021-11-03 03:55:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:55:57,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:57,672 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:55:57,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 03:55:57,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:57,882 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 03:55:57,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:57,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193471239] [2021-11-03 03:55:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:57,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:57,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:57,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:55:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:55:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:58,033 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 03:55:58,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:58,065 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 03:55:58,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:58,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193471239] [2021-11-03 03:55:58,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193471239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:58,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:58,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:55:58,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969218139] [2021-11-03 03:55:58,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:55:58,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:55:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:55:58,069 INFO L87 Difference]: Start difference. First operand 1797 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:58,191 INFO L93 Difference]: Finished difference Result 3160 states and 3716 transitions. [2021-11-03 03:55:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:55:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 03:55:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:58,209 INFO L225 Difference]: With dead ends: 3160 [2021-11-03 03:55:58,210 INFO L226 Difference]: Without dead ends: 3160 [2021-11-03 03:55:58,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 03:55:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-03 03:55:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 2631. [2021-11-03 03:55:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 1884 states have (on average 1.9723991507430998) internal successors, (3716), 2630 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states 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 03:55:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 3716 transitions. [2021-11-03 03:55:58,286 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 3716 transitions. Word has length 6 [2021-11-03 03:55:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:58,286 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 3716 transitions. [2021-11-03 03:55:58,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 3716 transitions. [2021-11-03 03:55:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:55:58,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:58,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:58,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:55:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:58,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 03:55:58,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:58,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845965420] [2021-11-03 03:55:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:58,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:58,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:58,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:58,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:55:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:55:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:58,727 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 03:55:58,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:58,756 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 03:55:58,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:58,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845965420] [2021-11-03 03:55:58,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845965420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:58,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:58,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:55:58,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776845305] [2021-11-03 03:55:58,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:55:58,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:55:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:55:58,767 INFO L87 Difference]: Start difference. First operand 2631 states and 3716 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:58,812 INFO L93 Difference]: Finished difference Result 2571 states and 3630 transitions. [2021-11-03 03:55:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 03:55:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:58,827 INFO L225 Difference]: With dead ends: 2571 [2021-11-03 03:55:58,828 INFO L226 Difference]: Without dead ends: 2571 [2021-11-03 03:55:58,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 03:55:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-11-03 03:55:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2571. [2021-11-03 03:55:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 1848 states have (on average 1.9642857142857142) internal successors, (3630), 2570 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states 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 03:55:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3630 transitions. [2021-11-03 03:55:58,887 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3630 transitions. Word has length 11 [2021-11-03 03:55:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:58,888 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 3630 transitions. [2021-11-03 03:55:58,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3630 transitions. [2021-11-03 03:55:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 03:55:58,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:58,889 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:58,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:55:59,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:59,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 03:55:59,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:59,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246530700] [2021-11-03 03:55:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:59,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:59,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:59,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:59,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:55:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:55:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:59,338 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 03:55:59,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:55:59,379 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 03:55:59,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:59,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246530700] [2021-11-03 03:55:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246530700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:59,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:59,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:55:59,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750132311] [2021-11-03 03:55:59,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:55:59,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:55:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:55:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:55:59,384 INFO L87 Difference]: Start difference. First operand 2571 states and 3630 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 03:55:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:59,481 INFO L93 Difference]: Finished difference Result 2543 states and 3574 transitions. [2021-11-03 03:55:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:55:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 03:55:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:59,496 INFO L225 Difference]: With dead ends: 2543 [2021-11-03 03:55:59,496 INFO L226 Difference]: Without dead ends: 2543 [2021-11-03 03:55:59,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 03:55:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-11-03 03:55:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2541. [2021-11-03 03:55:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 1832 states have (on average 1.9497816593886463) internal successors, (3572), 2540 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states 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 03:55:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3572 transitions. [2021-11-03 03:55:59,561 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3572 transitions. Word has length 13 [2021-11-03 03:55:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:59,562 INFO L470 AbstractCegarLoop]: Abstraction has 2541 states and 3572 transitions. [2021-11-03 03:55:59,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 03:55:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3572 transitions. [2021-11-03 03:55:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:55:59,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:59,564 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] [2021-11-03 03:55:59,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:55:59,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:55:59,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:55:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 03:55:59,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:55:59,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282948129] [2021-11-03 03:55:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:59,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:55:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:55:59,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:55:59,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:56:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:56:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:00,023 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 03:56:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:56:00,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:00,240 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 03:56:00,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:00,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282948129] [2021-11-03 03:56:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282948129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:00,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:00,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:56:00,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475106390] [2021-11-03 03:56:00,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:56:00,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:56:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:56:00,242 INFO L87 Difference]: Start difference. First operand 2541 states and 3572 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:04,682 INFO L93 Difference]: Finished difference Result 3580 states and 4803 transitions. [2021-11-03 03:56:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:56:04,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 03:56:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:04,712 INFO L225 Difference]: With dead ends: 3580 [2021-11-03 03:56:04,712 INFO L226 Difference]: Without dead ends: 3580 [2021-11-03 03:56:04,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 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 03:56:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-11-03 03:56:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2537. [2021-11-03 03:56:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1832 states have (on average 1.945414847161572) internal successors, (3564), 2536 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states 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 03:56:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3564 transitions. [2021-11-03 03:56:04,778 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3564 transitions. Word has length 27 [2021-11-03 03:56:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:04,778 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 3564 transitions. [2021-11-03 03:56:04,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3564 transitions. [2021-11-03 03:56:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:56:04,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:04,780 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] [2021-11-03 03:56:04,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:56:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:56:04,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:56:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 03:56:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:56:04,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480808031] [2021-11-03 03:56:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:04,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:56:04,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:56:04,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:56:04,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:56:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:56:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:05,201 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 03:56:05,486 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 03:56:05,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:06,014 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 03:56:06,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:06,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480808031] [2021-11-03 03:56:06,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480808031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:06,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:06,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:56:06,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558063794] [2021-11-03 03:56:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:56:06,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:56:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:56:06,017 INFO L87 Difference]: Start difference. First operand 2537 states and 3564 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:17,316 INFO L93 Difference]: Finished difference Result 3214 states and 4165 transitions. [2021-11-03 03:56:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:56:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 03:56:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:17,330 INFO L225 Difference]: With dead ends: 3214 [2021-11-03 03:56:17,330 INFO L226 Difference]: Without dead ends: 3214 [2021-11-03 03:56:17,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:56:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-03 03:56:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2533. [2021-11-03 03:56:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1832 states have (on average 1.9410480349344978) internal successors, (3556), 2532 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states 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 03:56:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3556 transitions. [2021-11-03 03:56:17,394 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3556 transitions. Word has length 27 [2021-11-03 03:56:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:17,394 INFO L470 AbstractCegarLoop]: Abstraction has 2533 states and 3556 transitions. [2021-11-03 03:56:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3556 transitions. [2021-11-03 03:56:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 03:56:17,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:17,397 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] [2021-11-03 03:56:17,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:56:17,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:56:17,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:56:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 03:56:17,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:56:17,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165194735] [2021-11-03 03:56:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:56:17,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:56:17,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:56:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:56:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:56:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:18,029 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 03:56:18,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:18,214 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 03:56:18,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:18,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165194735] [2021-11-03 03:56:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165194735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:18,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:56:18,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189351487] [2021-11-03 03:56:18,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:56:18,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:56:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:56:18,216 INFO L87 Difference]: Start difference. First operand 2533 states and 3556 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:18,292 INFO L93 Difference]: Finished difference Result 2521 states and 3536 transitions. [2021-11-03 03:56:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:56:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 03:56:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:18,306 INFO L225 Difference]: With dead ends: 2521 [2021-11-03 03:56:18,307 INFO L226 Difference]: Without dead ends: 2521 [2021-11-03 03:56:18,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 03:56:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-11-03 03:56:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2521. [2021-11-03 03:56:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 1820 states have (on average 1.9428571428571428) internal successors, (3536), 2520 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 03:56:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3536 transitions. [2021-11-03 03:56:18,358 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3536 transitions. Word has length 42 [2021-11-03 03:56:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:18,360 INFO L470 AbstractCegarLoop]: Abstraction has 2521 states and 3536 transitions. [2021-11-03 03:56:18,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3536 transitions. [2021-11-03 03:56:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:56:18,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:18,366 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] [2021-11-03 03:56:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:56:18,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:56:18,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:56:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 03:56:18,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:56:18,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715411717] [2021-11-03 03:56:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:18,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:56:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:56:18,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:56:18,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:56:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:56:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:19,321 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 03:56:19,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:19,744 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 03:56:19,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:19,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715411717] [2021-11-03 03:56:19,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715411717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:19,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:19,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:56:19,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423449668] [2021-11-03 03:56:19,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:56:19,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:56:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:56:19,747 INFO L87 Difference]: Start difference. First operand 2521 states and 3536 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:20,042 INFO L93 Difference]: Finished difference Result 2710 states and 3571 transitions. [2021-11-03 03:56:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:56:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 03:56:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:20,062 INFO L225 Difference]: With dead ends: 2710 [2021-11-03 03:56:20,062 INFO L226 Difference]: Without dead ends: 2710 [2021-11-03 03:56:20,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 03:56:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-11-03 03:56:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2337. [2021-11-03 03:56:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 1636 states have (on average 1.9443765281173595) internal successors, (3181), 2336 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states 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 03:56:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3181 transitions. [2021-11-03 03:56:20,152 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3181 transitions. Word has length 50 [2021-11-03 03:56:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 3181 transitions. [2021-11-03 03:56:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3181 transitions. [2021-11-03 03:56:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:56:20,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:20,155 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 03:56:20,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:56:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:56:20,371 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:56:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 03:56:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:56:20,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645009209] [2021-11-03 03:56:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:20,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:56:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:56:20,374 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:56:20,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:56:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:56:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:20,918 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 03:56:20,929 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 03:56:21,822 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:56:21,822 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 28 treesize of output 30 [2021-11-03 03:56:21,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:56:21,831 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 27 treesize of output 23 [2021-11-03 03:56:21,871 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 03:56:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:27,294 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 03:56:27,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:27,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645009209] [2021-11-03 03:56:27,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645009209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:27,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:27,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:56:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269997837] [2021-11-03 03:56:27,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:56:27,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:56:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:56:27,298 INFO L87 Difference]: Start difference. First operand 2337 states and 3181 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:56:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:50,637 INFO L93 Difference]: Finished difference Result 3003 states and 3979 transitions. [2021-11-03 03:56:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:56:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 03:56:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:50,651 INFO L225 Difference]: With dead ends: 3003 [2021-11-03 03:56:50,652 INFO L226 Difference]: Without dead ends: 3003 [2021-11-03 03:56:50,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:56:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-11-03 03:56:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2495. [2021-11-03 03:56:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1832 states have (on average 1.892467248908297) internal successors, (3467), 2494 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 03:56:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3467 transitions. [2021-11-03 03:56:50,742 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3467 transitions. Word has length 53 [2021-11-03 03:56:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:50,743 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3467 transitions. [2021-11-03 03:56:50,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:56:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3467 transitions. [2021-11-03 03:56:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:56:50,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:50,745 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] [2021-11-03 03:56:50,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:56:50,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:56:50,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:56:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 03:56:50,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:56:50,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712283732] [2021-11-03 03:56:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:50,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:56:50,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:56:50,965 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:56:50,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:56:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:51,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:56:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:51,632 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 03:56:51,654 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 21 treesize of output 17 [2021-11-03 03:56:51,711 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 23 treesize of output 11 [2021-11-03 03:56:51,759 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 03:56:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:51,960 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 03:56:51,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:56:51,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712283732] [2021-11-03 03:56:51,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712283732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:51,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:51,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:56:51,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055192054] [2021-11-03 03:56:51,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:56:51,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:56:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:56:51,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:56:51,963 INFO L87 Difference]: Start difference. First operand 2495 states and 3467 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 03:57:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:02,051 INFO L93 Difference]: Finished difference Result 3478 states and 4603 transitions. [2021-11-03 03:57:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:57:02,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-03 03:57:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:02,075 INFO L225 Difference]: With dead ends: 3478 [2021-11-03 03:57:02,075 INFO L226 Difference]: Without dead ends: 3478 [2021-11-03 03:57:02,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:57:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-11-03 03:57:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2494. [2021-11-03 03:57:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1832 states have (on average 1.8913755458515285) internal successors, (3465), 2493 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 03:57:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3465 transitions. [2021-11-03 03:57:02,135 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3465 transitions. Word has length 59 [2021-11-03 03:57:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:02,135 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 3465 transitions. [2021-11-03 03:57:02,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 03:57:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3465 transitions. [2021-11-03 03:57:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:57:02,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:02,138 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] [2021-11-03 03:57:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:57:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:57:02,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:57:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 03:57:02,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:02,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204870585] [2021-11-03 03:57:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:02,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:02,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:02,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:57:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:57:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:03,039 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 03:57:03,083 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 03:57:03,103 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 03:57:03,188 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 03:57:03,192 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 03:57:03,281 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 03:57:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:03,915 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 03:57:03,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:03,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204870585] [2021-11-03 03:57:03,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204870585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:57:03,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:57:03,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:57:03,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980172651] [2021-11-03 03:57:03,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:57:03,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:57:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:57:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:57:03,918 INFO L87 Difference]: Start difference. First operand 2494 states and 3465 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 03:57:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:38,470 INFO L93 Difference]: Finished difference Result 3248 states and 4271 transitions. [2021-11-03 03:57:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:57:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 60 [2021-11-03 03:57:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:38,478 INFO L225 Difference]: With dead ends: 3248 [2021-11-03 03:57:38,478 INFO L226 Difference]: Without dead ends: 3248 [2021-11-03 03:57:38,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:57:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-11-03 03:57:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2493. [2021-11-03 03:57:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 1832 states have (on average 1.89028384279476) internal successors, (3463), 2492 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states 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 03:57:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 3463 transitions. [2021-11-03 03:57:38,518 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 3463 transitions. Word has length 60 [2021-11-03 03:57:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:38,518 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 3463 transitions. [2021-11-03 03:57:38,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 03:57:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 3463 transitions. [2021-11-03 03:57:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 03:57:38,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:38,520 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] [2021-11-03 03:57:38,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:57:38,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:57:38,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:57:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 03:57:38,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:38,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23236417] [2021-11-03 03:57:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:38,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:38,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:57:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:39,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:57:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:39,444 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 03:57:39,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:39,577 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 03:57:39,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:39,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23236417] [2021-11-03 03:57:39,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23236417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:57:39,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:57:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:57:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896694200] [2021-11-03 03:57:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:57:39,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:57:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:57:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:57:39,581 INFO L87 Difference]: Start difference. First operand 2493 states and 3463 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:39,952 INFO L93 Difference]: Finished difference Result 3502 states and 4621 transitions. [2021-11-03 03:57:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:57:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 03:57:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:39,963 INFO L225 Difference]: With dead ends: 3502 [2021-11-03 03:57:39,964 INFO L226 Difference]: Without dead ends: 3502 [2021-11-03 03:57:39,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 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 03:57:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-11-03 03:57:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2511. [2021-11-03 03:57:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 1850 states have (on average 1.8816216216216217) internal successors, (3481), 2510 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states 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 03:57:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3481 transitions. [2021-11-03 03:57:40,023 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3481 transitions. Word has length 64 [2021-11-03 03:57:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:40,024 INFO L470 AbstractCegarLoop]: Abstraction has 2511 states and 3481 transitions. [2021-11-03 03:57:40,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3481 transitions. [2021-11-03 03:57:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:57:40,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:40,026 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] [2021-11-03 03:57:40,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 03:57:40,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:57:40,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:57:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 03:57:40,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:40,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140151519] [2021-11-03 03:57:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:40,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:40,246 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:40,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:57:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:57:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:41,129 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 03:57:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:41,394 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 03:57:41,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:41,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140151519] [2021-11-03 03:57:41,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140151519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:57:41,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009712680] [2021-11-03 03:57:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:41,395 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:57:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:57:41,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:57:41,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 03:57:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:57:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:42,341 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 03:57:42,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:42,492 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 03:57:42,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2009712680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:57:42,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269451559] [2021-11-03 03:57:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:42,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:57:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:57:42,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:57:42,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 03:57:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:57:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:43,392 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 03:57:43,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:43,538 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 03:57:43,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269451559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:57:43,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:57:43,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:57:43,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624595860] [2021-11-03 03:57:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:57:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:57:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:57:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:57:43,541 INFO L87 Difference]: Start difference. First operand 2511 states and 3481 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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 03:57:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:44,386 INFO L93 Difference]: Finished difference Result 3538 states and 4657 transitions. [2021-11-03 03:57:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:57:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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 66 [2021-11-03 03:57:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:44,396 INFO L225 Difference]: With dead ends: 3538 [2021-11-03 03:57:44,397 INFO L226 Difference]: Without dead ends: 3538 [2021-11-03 03:57:44,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:57:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-11-03 03:57:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2547. [2021-11-03 03:57:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 1886 states have (on average 1.8647932131495228) internal successors, (3517), 2546 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states 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 03:57:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3517 transitions. [2021-11-03 03:57:44,485 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3517 transitions. Word has length 66 [2021-11-03 03:57:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 3517 transitions. [2021-11-03 03:57:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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 03:57:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3517 transitions. [2021-11-03 03:57:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 03:57:44,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:44,487 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] [2021-11-03 03:57:44,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:57:44,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:57:44,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 03:57:45,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:57:45,101 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:57:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 03:57:45,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:45,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690693207] [2021-11-03 03:57:45,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:57:45,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:45,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:45,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:57:45,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:57:45,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:57:45,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:57:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:46,201 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 03:57:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:46,755 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 03:57:46,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:46,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690693207] [2021-11-03 03:57:46,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690693207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:57:46,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044539235] [2021-11-03 03:57:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:57:46,756 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:57:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:57:46,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:57:46,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:57:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:57:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:57:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:57:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:48,839 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 03:57:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:49,000 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 03:57:49,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044539235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:57:49,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732216908] [2021-11-03 03:57:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:57:49,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:57:49,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:57:49,002 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:57:49,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 03:58:04,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:58:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:58:04,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:58:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:04,533 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 03:58:04,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:04,678 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 03:58:04,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732216908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:58:04,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:58:04,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 03:58:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570268883] [2021-11-03 03:58:04,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 03:58:04,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 03:58:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:58:04,682 INFO L87 Difference]: Start difference. First operand 2547 states and 3517 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:08,199 INFO L93 Difference]: Finished difference Result 3610 states and 4729 transitions. [2021-11-03 03:58:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:58:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 03:58:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:08,208 INFO L225 Difference]: With dead ends: 3610 [2021-11-03 03:58:08,208 INFO L226 Difference]: Without dead ends: 3610 [2021-11-03 03:58:08,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 03:58:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-03 03:58:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2619. [2021-11-03 03:58:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 1958 states have (on average 1.8329928498467825) internal successors, (3589), 2618 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states 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 03:58:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 3589 transitions. [2021-11-03 03:58:08,272 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 3589 transitions. Word has length 70 [2021-11-03 03:58:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:08,272 INFO L470 AbstractCegarLoop]: Abstraction has 2619 states and 3589 transitions. [2021-11-03 03:58:08,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 3589 transitions. [2021-11-03 03:58:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 03:58:08,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:08,279 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] [2021-11-03 03:58:08,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-03 03:58:08,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:08,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:08,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:58:08,885 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 856 more)] === [2021-11-03 03:58:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 03:58:08,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:08,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468721769] [2021-11-03 03:58:08,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:58:08,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:08,888 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:08,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:58:10,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:58:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:58:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:58:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:10,672 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 03:58:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:11,982 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 03:58:11,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:11,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468721769] [2021-11-03 03:58:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468721769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:58:11,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [992030348] [2021-11-03 03:58:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:58:11,983 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:58:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:58:11,984 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:58:11,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 03:58:18,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:58:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:58:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:58:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:18,877 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 03:58:18,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:19,051 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 03:58:19,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [992030348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:58:19,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502654347] [2021-11-03 03:58:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:58:19,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:58:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:58:19,052 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:58:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ebe0-74ef-40b1-8049-27fe8ec9f36e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process