./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:41,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:41,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:41,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:41,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:41,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:41,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:41,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:41,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:41,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:41,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:41,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:41,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:41,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:41,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:41,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:41,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:41,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:41,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:41,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:41,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:41,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:41,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:41,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:41,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:41,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:41,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:41,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:41,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:41,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:41,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:41,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:41,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:41,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:41,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:41,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:41,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:41,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:42,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:42,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:42,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:42,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:02:42,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:42,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:42,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:42,075 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:42,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:42,076 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:42,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:02:42,076 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:42,076 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:42,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:02:42,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:02:42,079 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:42,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:02:42,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:02:42,079 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:02:42,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:02:42,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:02:42,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:42,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:42,081 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:02:42,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:42,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:42,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:42,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:02:42,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:02:42,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:02:42,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:42,086 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:42,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:42,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:42,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:42,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:42,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:42,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:42,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:42,088 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:02:42,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:02:42,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:42,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:42,089 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-07 02:02:42,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:42,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:42,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:42,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:42,441 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:42,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-07 02:02:42,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/431538f7d/7278635cd18b45e79ade81a11874ddd1/FLAG252e3e9e2 [2021-11-07 02:02:43,225 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:43,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-07 02:02:43,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/431538f7d/7278635cd18b45e79ade81a11874ddd1/FLAG252e3e9e2 [2021-11-07 02:02:43,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/431538f7d/7278635cd18b45e79ade81a11874ddd1 [2021-11-07 02:02:43,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:43,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:43,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:43,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:43,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:43,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:43" (1/1) ... [2021-11-07 02:02:43,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171255b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:43, skipping insertion in model container [2021-11-07 02:02:43,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:43" (1/1) ... [2021-11-07 02:02:43,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:43,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:44,122 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-07 02:02:44,310 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-07 02:02:44,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:44,330 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:02:44,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39ee49fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:44, skipping insertion in model container [2021-11-07 02:02:44,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:44,336 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:02:44,337 INFO L168 Benchmark]: Toolchain (without parser) took 936.23 ms. Allocated memory was 90.2 MB in the beginning and 130.0 MB in the end (delta: 39.8 MB). Free memory was 53.2 MB in the beginning and 95.4 MB in the end (delta: -42.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:44,338 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 69.1 MB in the beginning and 69.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:02:44,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 933.07 ms. Allocated memory was 90.2 MB in the beginning and 130.0 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 95.4 MB in the end (delta: -42.4 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:44,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 69.1 MB in the beginning and 69.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 933.07 ms. Allocated memory was 90.2 MB in the beginning and 130.0 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 95.4 MB in the end (delta: -42.4 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:46,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:46,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:47,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:47,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:47,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:47,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:47,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:47,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:47,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:47,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:47,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:47,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:47,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:47,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:47,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:47,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:47,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:47,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:47,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:47,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:47,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:47,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:47,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:47,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:47,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:47,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:47,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:47,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:47,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:47,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:47,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:47,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:47,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:47,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:47,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:47,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:47,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:47,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:47,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:47,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:02:47,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:47,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:47,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:47,216 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:47,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:47,217 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:47,217 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:47,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:47,218 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:47,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:02:47,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:02:47,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:47,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:47,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:02:47,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:47,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:47,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:47,223 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:02:47,224 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:02:47,224 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:02:47,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:47,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:47,225 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:02:47,225 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:02:47,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:47,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:47,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:47,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:02:47,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:47,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:47,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:47,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:47,228 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:02:47,228 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:47,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:47,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:47,229 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-07 02:02:47,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:47,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:47,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:47,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:47,748 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:47,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-07 02:02:47,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/fa4f684e3/da78b87ce52e4ce1ba9c6ef676c5b269/FLAGbc77d7f00 [2021-11-07 02:02:48,614 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:48,619 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-07 02:02:48,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/fa4f684e3/da78b87ce52e4ce1ba9c6ef676c5b269/FLAGbc77d7f00 [2021-11-07 02:02:48,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/data/fa4f684e3/da78b87ce52e4ce1ba9c6ef676c5b269 [2021-11-07 02:02:48,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:48,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:48,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:48,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:48,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:48,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:48" (1/1) ... [2021-11-07 02:02:48,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d929f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:48, skipping insertion in model container [2021-11-07 02:02:48,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:48" (1/1) ... [2021-11-07 02:02:48,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:48,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:49,383 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-07 02:02:49,540 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-07 02:02:49,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:49,597 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:02:49,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:49,673 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-07 02:02:49,807 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-07 02:02:49,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:49,834 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:02:49,888 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-07 02:02:50,038 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_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-07 02:02:50,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:50,122 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:02:50,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50 WrapperNode [2021-11-07 02:02:50,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:50,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:50,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:02:50,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:02:50,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:50,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:02:50,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:02:50,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:02:50,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:02:50,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:02:50,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:02:50,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:02:50,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (1/1) ... [2021-11-07 02:02:50,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:50,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:02:50,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:02:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:02:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:02:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:02:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:02:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:02:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:02:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:02:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:02:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:02:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:02:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:02:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:02:56,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:02:56,936 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-07 02:02:56,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:56 BoogieIcfgContainer [2021-11-07 02:02:56,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:02:56,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:02:56,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:02:56,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:02:56,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:48" (1/3) ... [2021-11-07 02:02:56,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f02541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:56, skipping insertion in model container [2021-11-07 02:02:56,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:50" (2/3) ... [2021-11-07 02:02:56,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f02541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:56, skipping insertion in model container [2021-11-07 02:02:56,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:56" (3/3) ... [2021-11-07 02:02:56,957 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2021-11-07 02:02:56,964 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:02:56,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 538 error locations. [2021-11-07 02:02:57,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:02:57,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:02:57,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 538 error locations. [2021-11-07 02:02:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 541 states have (on average 2.243992606284658) internal successors, (1214), 1079 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:02:57,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:57,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:02:57,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:02:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 02:02:57,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:57,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760849094] [2021-11-07 02:02:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:57,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:57,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:57,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:02:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:02:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:57,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:57,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:57,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760849094] [2021-11-07 02:02:57,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760849094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:57,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:57,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162406522] [2021-11-07 02:02:57,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:57,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:57,577 INFO L87 Difference]: Start difference. First operand has 1080 states, 541 states have (on average 2.243992606284658) internal successors, (1214), 1079 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:00,100 INFO L93 Difference]: Finished difference Result 1075 states and 1136 transitions. [2021-11-07 02:03:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 02:03:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:00,139 INFO L225 Difference]: With dead ends: 1075 [2021-11-07 02:03:00,139 INFO L226 Difference]: Without dead ends: 1073 [2021-11-07 02:03:00,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-11-07 02:03:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1065. [2021-11-07 02:03:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 541 states have (on average 2.0831792975970425) internal successors, (1127), 1064 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1127 transitions. [2021-11-07 02:03:00,307 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1127 transitions. Word has length 3 [2021-11-07 02:03:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:00,308 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1127 transitions. [2021-11-07 02:03:00,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1127 transitions. [2021-11-07 02:03:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:03:00,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:00,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:03:00,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:00,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:00,524 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:00,525 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 02:03:00,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:00,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97195619] [2021-11-07 02:03:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:00,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:00,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:00,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:00,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:03:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:00,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:00,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:00,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:00,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97195619] [2021-11-07 02:03:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97195619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:00,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:00,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:03:00,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682525723] [2021-11-07 02:03:00,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:00,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:00,854 INFO L87 Difference]: Start difference. First operand 1065 states and 1127 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:06,784 INFO L93 Difference]: Finished difference Result 1560 states and 1660 transitions. [2021-11-07 02:03:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 02:03:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:06,795 INFO L225 Difference]: With dead ends: 1560 [2021-11-07 02:03:06,795 INFO L226 Difference]: Without dead ends: 1560 [2021-11-07 02:03:06,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-11-07 02:03:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1100. [2021-11-07 02:03:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 585 states have (on average 2.0615384615384613) internal successors, (1206), 1099 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1206 transitions. [2021-11-07 02:03:06,832 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1206 transitions. Word has length 3 [2021-11-07 02:03:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:06,833 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1206 transitions. [2021-11-07 02:03:06,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1206 transitions. [2021-11-07 02:03:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:03:06,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:06,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:06,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:03:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:07,047 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 02:03:07,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:07,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829643319] [2021-11-07 02:03:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:07,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:07,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:03:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:07,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:07,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:07,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:07,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829643319] [2021-11-07 02:03:07,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829643319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:07,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:07,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:03:07,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008410047] [2021-11-07 02:03:07,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:07,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:07,361 INFO L87 Difference]: Start difference. First operand 1100 states and 1206 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-07 02:03:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:09,718 INFO L93 Difference]: Finished difference Result 1428 states and 1559 transitions. [2021-11-07 02:03:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-11-07 02:03:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:09,727 INFO L225 Difference]: With dead ends: 1428 [2021-11-07 02:03:09,728 INFO L226 Difference]: Without dead ends: 1428 [2021-11-07 02:03:09,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-07 02:03:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1051. [2021-11-07 02:03:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 585 states have (on average 1.9726495726495727) internal successors, (1154), 1050 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1154 transitions. [2021-11-07 02:03:09,762 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1154 transitions. Word has length 8 [2021-11-07 02:03:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:09,763 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1154 transitions. [2021-11-07 02:03:09,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-07 02:03:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1154 transitions. [2021-11-07 02:03:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:03:09,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:09,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:09,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:09,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 02:03:09,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:09,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937242305] [2021-11-07 02:03:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:09,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:09,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:09,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:03:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:10,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:10,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:10,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:10,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937242305] [2021-11-07 02:03:10,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937242305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:10,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:10,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:03:10,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286061145] [2021-11-07 02:03:10,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:10,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:10,342 INFO L87 Difference]: Start difference. First operand 1051 states and 1154 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:15,756 INFO L93 Difference]: Finished difference Result 1471 states and 1566 transitions. [2021-11-07 02:03:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 02:03:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:15,766 INFO L225 Difference]: With dead ends: 1471 [2021-11-07 02:03:15,767 INFO L226 Difference]: Without dead ends: 1471 [2021-11-07 02:03:15,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-11-07 02:03:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1041. [2021-11-07 02:03:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 585 states have (on average 1.9504273504273504) internal successors, (1141), 1040 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1141 transitions. [2021-11-07 02:03:15,798 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1141 transitions. Word has length 8 [2021-11-07 02:03:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1141 transitions. [2021-11-07 02:03:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1141 transitions. [2021-11-07 02:03:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:03:15,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:15,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:15,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:16,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:16,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash -945574260, now seen corresponding path program 1 times [2021-11-07 02:03:16,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:16,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340955322] [2021-11-07 02:03:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:16,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:16,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:03:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:16,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:16,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:16,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340955322] [2021-11-07 02:03:16,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340955322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:16,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:16,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:16,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336781439] [2021-11-07 02:03:16,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:16,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:16,427 INFO L87 Difference]: Start difference. First operand 1041 states and 1141 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:17,495 INFO L93 Difference]: Finished difference Result 1487 states and 1619 transitions. [2021-11-07 02:03:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 02:03:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:17,510 INFO L225 Difference]: With dead ends: 1487 [2021-11-07 02:03:17,512 INFO L226 Difference]: Without dead ends: 1487 [2021-11-07 02:03:17,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-11-07 02:03:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1277. [2021-11-07 02:03:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 821 states have (on average 1.9378806333739342) internal successors, (1591), 1276 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1591 transitions. [2021-11-07 02:03:17,561 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1591 transitions. Word has length 11 [2021-11-07 02:03:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1591 transitions. [2021-11-07 02:03:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1591 transitions. [2021-11-07 02:03:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:03:17,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:17,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:17,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:17,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:17,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr537ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash 751971392, now seen corresponding path program 1 times [2021-11-07 02:03:17,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:17,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194615048] [2021-11-07 02:03:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:17,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:17,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:17,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:17,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:03:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:18,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:18,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:18,164 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:03:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 02:03:18,253 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:03:18,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 02:03:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:18,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:18,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194615048] [2021-11-07 02:03:18,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194615048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:18,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:18,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:18,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19444916] [2021-11-07 02:03:18,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:18,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:18,405 INFO L87 Difference]: Start difference. First operand 1277 states and 1591 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:20,490 INFO L93 Difference]: Finished difference Result 1661 states and 2040 transitions. [2021-11-07 02:03:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:20,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 02:03:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:20,501 INFO L225 Difference]: With dead ends: 1661 [2021-11-07 02:03:20,501 INFO L226 Difference]: Without dead ends: 1661 [2021-11-07 02:03:20,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-11-07 02:03:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1276. [2021-11-07 02:03:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 820 states have (on average 1.9378048780487804) internal successors, (1589), 1275 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1589 transitions. [2021-11-07 02:03:20,536 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1589 transitions. Word has length 12 [2021-11-07 02:03:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:20,537 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1589 transitions. [2021-11-07 02:03:20,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1589 transitions. [2021-11-07 02:03:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 02:03:20,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:20,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:20,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:20,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-07 02:03:20,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:20,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621425449] [2021-11-07 02:03:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:20,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:20,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:20,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:03:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:21,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:21,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:21,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621425449] [2021-11-07 02:03:21,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621425449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:21,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:21,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:21,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900502880] [2021-11-07 02:03:21,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:21,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:21,105 INFO L87 Difference]: Start difference. First operand 1276 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:21,132 INFO L93 Difference]: Finished difference Result 1216 states and 1503 transitions. [2021-11-07 02:03:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 02:03:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:21,138 INFO L225 Difference]: With dead ends: 1216 [2021-11-07 02:03:21,139 INFO L226 Difference]: Without dead ends: 1216 [2021-11-07 02:03:21,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-07 02:03:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-07 02:03:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 784 states have (on average 1.9170918367346939) internal successors, (1503), 1215 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1503 transitions. [2021-11-07 02:03:21,164 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1503 transitions. Word has length 18 [2021-11-07 02:03:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:21,165 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1503 transitions. [2021-11-07 02:03:21,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1503 transitions. [2021-11-07 02:03:21,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:03:21,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:21,166 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] [2021-11-07 02:03:21,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:21,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:21,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-07 02:03:21,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:21,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693397243] [2021-11-07 02:03:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:21,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:21,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:21,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:21,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:03:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:21,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:21,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693397243] [2021-11-07 02:03:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693397243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:21,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:21,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:03:21,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47614630] [2021-11-07 02:03:21,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:21,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:21,737 INFO L87 Difference]: Start difference. First operand 1216 states and 1503 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:21,845 INFO L93 Difference]: Finished difference Result 1188 states and 1447 transitions. [2021-11-07 02:03:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 20 [2021-11-07 02:03:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:21,853 INFO L225 Difference]: With dead ends: 1188 [2021-11-07 02:03:21,853 INFO L226 Difference]: Without dead ends: 1188 [2021-11-07 02:03:21,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-11-07 02:03:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1186. [2021-11-07 02:03:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 768 states have (on average 1.8815104166666667) internal successors, (1445), 1185 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1445 transitions. [2021-11-07 02:03:21,889 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1445 transitions. Word has length 20 [2021-11-07 02:03:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:21,890 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1445 transitions. [2021-11-07 02:03:21,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1445 transitions. [2021-11-07 02:03:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:03:21,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:21,893 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] [2021-11-07 02:03:21,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:22,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:22,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-07 02:03:22,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:22,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485152674] [2021-11-07 02:03:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:22,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:22,110 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:22,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:03:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:22,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:22,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:22,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485152674] [2021-11-07 02:03:22,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485152674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:22,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:22,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:22,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60049873] [2021-11-07 02:03:22,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:22,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:22,700 INFO L87 Difference]: Start difference. First operand 1186 states and 1445 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:25,330 INFO L93 Difference]: Finished difference Result 1678 states and 2063 transitions. [2021-11-07 02:03:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 02:03:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:25,338 INFO L225 Difference]: With dead ends: 1678 [2021-11-07 02:03:25,338 INFO L226 Difference]: Without dead ends: 1678 [2021-11-07 02:03:25,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-07 02:03:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1182. [2021-11-07 02:03:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 768 states have (on average 1.87109375) internal successors, (1437), 1181 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1437 transitions. [2021-11-07 02:03:25,365 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1437 transitions. Word has length 34 [2021-11-07 02:03:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1437 transitions. [2021-11-07 02:03:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1437 transitions. [2021-11-07 02:03:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:03:25,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:25,367 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] [2021-11-07 02:03:25,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 02:03:25,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:25,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-07 02:03:25,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:25,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944780191] [2021-11-07 02:03:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:25,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:25,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:25,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:25,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:03:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:26,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:26,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:26,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944780191] [2021-11-07 02:03:26,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944780191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:26,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:26,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:03:26,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937305391] [2021-11-07 02:03:26,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:26,899 INFO L87 Difference]: Start difference. First operand 1182 states and 1437 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:34,656 INFO L93 Difference]: Finished difference Result 1809 states and 2216 transitions. [2021-11-07 02:03:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:03:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 02:03:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:34,668 INFO L225 Difference]: With dead ends: 1809 [2021-11-07 02:03:34,668 INFO L226 Difference]: Without dead ends: 1809 [2021-11-07 02:03:34,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:03:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-11-07 02:03:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1178. [2021-11-07 02:03:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 768 states have (on average 1.8606770833333333) internal successors, (1429), 1177 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1429 transitions. [2021-11-07 02:03:34,696 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1429 transitions. Word has length 34 [2021-11-07 02:03:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:34,697 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1429 transitions. [2021-11-07 02:03:34,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1429 transitions. [2021-11-07 02:03:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:03:34,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:34,700 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] [2021-11-07 02:03:34,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:03:34,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,913 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-07 02:03:34,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:34,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261745321] [2021-11-07 02:03:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:34,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:34,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:34,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:03:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:35,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:35,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:35,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:35,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261745321] [2021-11-07 02:03:35,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261745321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:35,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:35,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:35,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850664197] [2021-11-07 02:03:35,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:35,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:35,624 INFO L87 Difference]: Start difference. First operand 1178 states and 1429 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-07 02:03:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:35,692 INFO L93 Difference]: Finished difference Result 1166 states and 1409 transitions. [2021-11-07 02:03:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 52 [2021-11-07 02:03:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:35,700 INFO L225 Difference]: With dead ends: 1166 [2021-11-07 02:03:35,701 INFO L226 Difference]: Without dead ends: 1166 [2021-11-07 02:03:35,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-07 02:03:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1166. [2021-11-07 02:03:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 756 states have (on average 1.8637566137566137) internal successors, (1409), 1165 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1409 transitions. [2021-11-07 02:03:35,724 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1409 transitions. Word has length 52 [2021-11-07 02:03:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:35,725 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1409 transitions. [2021-11-07 02:03:35,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-07 02:03:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1409 transitions. [2021-11-07 02:03:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:03:35,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:35,729 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] [2021-11-07 02:03:35,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:35,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:35,943 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:03:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-07 02:03:35,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:35,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978395658] [2021-11-07 02:03:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:35,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:35,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:35,945 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:35,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:03:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:36,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:37,350 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:03:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-07 02:03:37,375 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:03:37,376 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 26 treesize of output 22 [2021-11-07 02:03:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:37,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:45,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:45,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978395658] [2021-11-07 02:03:45,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978395658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:45,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:45,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:03:45,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98718880] [2021-11-07 02:03:45,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:45,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:45,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:45,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-07 02:03:45,157 INFO L87 Difference]: Start difference. First operand 1166 states and 1409 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:02,958 INFO L93 Difference]: Finished difference Result 2115 states and 2666 transitions. [2021-11-07 02:04:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:04:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2021-11-07 02:04:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:02,968 INFO L225 Difference]: With dead ends: 2115 [2021-11-07 02:04:02,969 INFO L226 Difference]: Without dead ends: 2115 [2021-11-07 02:04:02,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26, Invalid=27, Unknown=3, NotChecked=0, Total=56 [2021-11-07 02:04:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-11-07 02:04:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1128. [2021-11-07 02:04:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 756 states have (on average 1.8134920634920635) internal successors, (1371), 1127 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1371 transitions. [2021-11-07 02:04:02,994 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1371 transitions. Word has length 60 [2021-11-07 02:04:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1371 transitions. [2021-11-07 02:04:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1371 transitions. [2021-11-07 02:04:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:04:02,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:02,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:03,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:03,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:03,213 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:04:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-07 02:04:03,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:03,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708181943] [2021-11-07 02:04:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:03,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:03,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:03,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:03,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:04:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:03,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:04:03,814 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 24 treesize of output 20 [2021-11-07 02:04:03,869 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 26 treesize of output 14 [2021-11-07 02:04:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:03,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:04,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:04,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708181943] [2021-11-07 02:04:04,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708181943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:04,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:04,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:04:04,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595010169] [2021-11-07 02:04:04,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:04,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:04,075 INFO L87 Difference]: Start difference. First operand 1128 states and 1371 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:09,739 INFO L93 Difference]: Finished difference Result 1817 states and 2195 transitions. [2021-11-07 02:04:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:04:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:04:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:09,748 INFO L225 Difference]: With dead ends: 1817 [2021-11-07 02:04:09,748 INFO L226 Difference]: Without dead ends: 1817 [2021-11-07 02:04:09,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:04:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-11-07 02:04:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1127. [2021-11-07 02:04:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 756 states have (on average 1.812169312169312) internal successors, (1370), 1126 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1370 transitions. [2021-11-07 02:04:09,771 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1370 transitions. Word has length 66 [2021-11-07 02:04:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:09,771 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1370 transitions. [2021-11-07 02:04:09,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1370 transitions. [2021-11-07 02:04:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:04:09,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:09,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:09,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:04:09,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:09,988 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:04:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-07 02:04:09,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:09,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993172984] [2021-11-07 02:04:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:09,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:09,990 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:04:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:10,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:04:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:04:10,657 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 [2021-11-07 02:04:10,668 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 [2021-11-07 02:04:10,748 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 [2021-11-07 02:04:10,751 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 [2021-11-07 02:04:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:10,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:11,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:11,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993172984] [2021-11-07 02:04:11,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993172984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:11,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:11,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:04:11,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330025368] [2021-11-07 02:04:11,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:04:11,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:04:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:04:11,331 INFO L87 Difference]: Start difference. First operand 1127 states and 1370 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:27,285 INFO L93 Difference]: Finished difference Result 1745 states and 2145 transitions. [2021-11-07 02:04:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:04:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:04:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:27,293 INFO L225 Difference]: With dead ends: 1745 [2021-11-07 02:04:27,293 INFO L226 Difference]: Without dead ends: 1745 [2021-11-07 02:04:27,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:04:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-11-07 02:04:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1126. [2021-11-07 02:04:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 756 states have (on average 1.810846560846561) internal successors, (1369), 1125 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1369 transitions. [2021-11-07 02:04:27,313 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1369 transitions. Word has length 67 [2021-11-07 02:04:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:27,313 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1369 transitions. [2021-11-07 02:04:27,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1369 transitions. [2021-11-07 02:04:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:04:27,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:27,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:27,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:04:27,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:27,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:04:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-07 02:04:27,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:27,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393932475] [2021-11-07 02:04:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:27,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:27,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:27,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:04:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:04:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:28,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:28,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:28,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393932475] [2021-11-07 02:04:28,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393932475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:28,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:28,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:28,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979046140] [2021-11-07 02:04:28,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:28,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:28,327 INFO L87 Difference]: Start difference. First operand 1126 states and 1369 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:28,523 INFO L93 Difference]: Finished difference Result 2102 states and 2548 transitions. [2021-11-07 02:04:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 71 [2021-11-07 02:04:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:28,532 INFO L225 Difference]: With dead ends: 2102 [2021-11-07 02:04:28,532 INFO L226 Difference]: Without dead ends: 2102 [2021-11-07 02:04:28,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:04:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-11-07 02:04:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1129. [2021-11-07 02:04:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 759 states have (on average 1.8076416337285903) internal successors, (1372), 1128 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1372 transitions. [2021-11-07 02:04:28,569 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1372 transitions. Word has length 71 [2021-11-07 02:04:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1372 transitions. [2021-11-07 02:04:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1372 transitions. [2021-11-07 02:04:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:04:28,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:28,573 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:28,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:28,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:28,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:04:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-07 02:04:28,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:28,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083059836] [2021-11-07 02:04:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:28,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:28,797 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:28,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:04:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:29,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:29,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:29,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083059836] [2021-11-07 02:04:29,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083059836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:29,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888724273] [2021-11-07 02:04:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:29,787 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:29,789 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:29,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:04:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:04:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:30,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888724273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727931538] [2021-11-07 02:04:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:30,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:30,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:30,791 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:04:30,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:04:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:31,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:31,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:31,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727931538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:31,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:04:31,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:04:31,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090433544] [2021-11-07 02:04:31,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:04:31,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:04:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:04:31,869 INFO L87 Difference]: Start difference. First operand 1129 states and 1372 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:32,901 INFO L93 Difference]: Finished difference Result 3091 states and 3740 transitions. [2021-11-07 02:04:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:04:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:04:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:32,916 INFO L225 Difference]: With dead ends: 3091 [2021-11-07 02:04:32,917 INFO L226 Difference]: Without dead ends: 3091 [2021-11-07 02:04:32,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:04:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-07 02:04:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 1138. [2021-11-07 02:04:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 768 states have (on average 1.80078125) internal successors, (1383), 1137 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1383 transitions. [2021-11-07 02:04:32,949 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1383 transitions. Word has length 73 [2021-11-07 02:04:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:32,949 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1383 transitions. [2021-11-07 02:04:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1383 transitions. [2021-11-07 02:04:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:04:32,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:32,951 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:32,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:33,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:33,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:33,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:33,566 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:04:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-07 02:04:33,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:33,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776340573] [2021-11-07 02:04:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:04:33,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:33,568 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:33,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:04:34,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:04:34,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:04:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:04:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:35,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:35,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776340573] [2021-11-07 02:04:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776340573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:35,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398771133] [2021-11-07 02:04:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:04:35,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:35,387 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:04:36,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:04:36,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:04:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:04:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:37,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:37,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398771133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:37,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859706600] [2021-11-07 02:04:37,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:04:37,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:37,217 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:04:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 02:05:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:05:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:05:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:05,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:06,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859706600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:06,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:05:06,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 25 [2021-11-07 02:05:06,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330016240] [2021-11-07 02:05:06,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:05:06,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:05:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:05:06,628 INFO L87 Difference]: Start difference. First operand 1138 states and 1383 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:12,383 INFO L93 Difference]: Finished difference Result 5825 states and 7074 transitions. [2021-11-07 02:05:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 02:05:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 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 77 [2021-11-07 02:05:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:12,402 INFO L225 Difference]: With dead ends: 5825 [2021-11-07 02:05:12,403 INFO L226 Difference]: Without dead ends: 5825 [2021-11-07 02:05:12,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=769, Invalid=1883, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 02:05:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5825 states. [2021-11-07 02:05:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5825 to 1154. [2021-11-07 02:05:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 784 states have (on average 1.788265306122449) internal successors, (1402), 1153 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1402 transitions. [2021-11-07 02:05:12,446 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1402 transitions. Word has length 77 [2021-11-07 02:05:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:12,446 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1402 transitions. [2021-11-07 02:05:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1402 transitions. [2021-11-07 02:05:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:05:12,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:12,448 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:12,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-07 02:05:12,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 02:05:12,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 02:05:13,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:13,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-07 02:05:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-07 02:05:13,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:13,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83585570] [2021-11-07 02:05:13,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:05:13,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:13,066 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:13,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:05:14,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 02:05:14,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:05:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:15,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:16,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:16,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83585570] [2021-11-07 02:05:16,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83585570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:16,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145852771] [2021-11-07 02:05:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:05:16,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:16,802 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:16,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:05:19,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 02:05:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:05:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:20,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:20,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145852771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:20,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069340158] [2021-11-07 02:05:20,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:05:20,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:05:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:20,663 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:05:20,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2579e38-b832-4ac5-b7c8-1592dfdf0cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process