./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/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_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:42,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:42,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:42,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:42,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:42,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:42,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:42,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:42,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:42,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:42,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:42,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:42,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:42,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:42,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:42,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:42,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:42,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:42,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:42,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:42,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:42,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:42,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:42,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:42,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:42,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:42,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:42,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:42,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:42,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:42,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:42,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:42,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:42,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:42,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:42,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:42,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:42,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:42,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:42,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:42,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:42,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:17:42,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:42,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:42,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:42,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:42,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:42,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:42,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:17:42,880 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:42,880 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:42,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:17:42,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:17:42,882 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:42,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:17:42,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:17:42,896 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:17:42,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:42,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:42,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:17:42,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:42,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:42,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:17:42,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:42,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:17:42,898 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:42,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:42,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:17:42,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:42,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:17:42,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:42,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:42,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:42,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:42,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:42,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:17:42,901 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:17:42,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:17:42,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:17:42,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:42,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:42,902 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f [2021-11-07 02:17:43,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:43,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:43,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:43,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:43,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:43,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-07 02:17:43,319 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/59efa1789/730cf9f536ee4650925491ac6760de89/FLAGe5f8b910e [2021-11-07 02:17:43,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:43,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-07 02:17:44,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/59efa1789/730cf9f536ee4650925491ac6760de89/FLAGe5f8b910e [2021-11-07 02:17:44,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/59efa1789/730cf9f536ee4650925491ac6760de89 [2021-11-07 02:17:44,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:44,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:44,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:44,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:44,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:44,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:44" (1/1) ... [2021-11-07 02:17:44,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cca37c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:44, skipping insertion in model container [2021-11-07 02:17:44,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:44" (1/1) ... [2021-11-07 02:17:44,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:44,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:44,724 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-07 02:17:44,885 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-07 02:17:44,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:44,922 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 02:17:44,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42849fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:44, skipping insertion in model container [2021-11-07 02:17:44,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:44,923 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:17:44,925 INFO L168 Benchmark]: Toolchain (without parser) took 771.31 ms. Allocated memory is still 92.3 MB. Free memory was 65.3 MB in the beginning and 55.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:44,926 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:17:44,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 768.82 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 55.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:44,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 768.82 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 55.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/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_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:47,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:47,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:48,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:48,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:48,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:48,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:48,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:48,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:48,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:48,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:48,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:48,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:48,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:48,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:48,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:48,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:48,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:48,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:48,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:48,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:48,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:48,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:48,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:48,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:48,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:48,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:48,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:48,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:48,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:48,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:48,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:48,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:48,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:48,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:48,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:48,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:48,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:48,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:48,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:48,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:48,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:17:48,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:48,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:48,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:48,117 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:48,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:48,117 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:48,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:48,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:48,118 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:48,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:48,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:48,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:48,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:48,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:17:48,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:48,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:17:48,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:48,122 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:17:48,122 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:17:48,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:48,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:17:48,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:48,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:17:48,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:48,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:17:48,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:48,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:48,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:48,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:48,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:17:48,126 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:17:48,127 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:48,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:17:48,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:48,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:48,128 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f [2021-11-07 02:17:48,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:48,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:48,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:48,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:48,615 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:48,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-07 02:17:48,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/6256ce02d/49cab5832a3c489a8a190b672d7fc984/FLAG9e94b1dd5 [2021-11-07 02:17:49,476 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:49,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-07 02:17:49,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/6256ce02d/49cab5832a3c489a8a190b672d7fc984/FLAG9e94b1dd5 [2021-11-07 02:17:49,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/data/6256ce02d/49cab5832a3c489a8a190b672d7fc984 [2021-11-07 02:17:49,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:49,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:49,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:49,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:49,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:49,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:49" (1/1) ... [2021-11-07 02:17:49,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac6bfd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:49, skipping insertion in model container [2021-11-07 02:17:49,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:49" (1/1) ... [2021-11-07 02:17:49,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:49,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:50,642 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-07 02:17:50,755 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-07 02:17:50,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:50,788 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:17:50,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:50,856 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-07 02:17:50,964 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-07 02:17:50,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:50,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:17:51,029 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-07 02:17:51,126 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_33bfad03-0ada-4784-ae7c-57a0c63ec633/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-07 02:17:51,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:51,213 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:17:51,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51 WrapperNode [2021-11-07 02:17:51,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:51,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:51,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:17:51,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:17:51,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:51,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:17:51,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:17:51,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:17:51,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:17:51,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:17:51,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:17:51,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:17:51,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (1/1) ... [2021-11-07 02:17:51,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:51,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:51,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:17:51,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:17:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:17:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:17:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:17:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:17:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:17:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:17:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:17:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:17:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:17:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:17:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:17:51,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:17:58,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:17:58,897 INFO L299 CfgBuilder]: Removed 94 assume(true) statements. [2021-11-07 02:17:58,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:58 BoogieIcfgContainer [2021-11-07 02:17:58,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:17:58,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:17:58,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:17:58,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:17:58,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:17:49" (1/3) ... [2021-11-07 02:17:58,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b49fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:58, skipping insertion in model container [2021-11-07 02:17:58,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:51" (2/3) ... [2021-11-07 02:17:58,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b49fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:58, skipping insertion in model container [2021-11-07 02:17:58,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:58" (3/3) ... [2021-11-07 02:17:58,913 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test3-2.i [2021-11-07 02:17:58,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:17:58,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:17:58,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:17:59,004 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 02:17:59,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:17:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 224 states have (on average 1.71875) internal successors, (385), 230 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 02:17:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:17:59,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:59,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:59,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:17:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:59,053 INFO L85 PathProgramCache]: Analyzing trace with hash 239232295, now seen corresponding path program 1 times [2021-11-07 02:17:59,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:59,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720201703] [2021-11-07 02:17:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:59,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:59,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:59,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:17:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:59,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:17:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:59,324 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 02:17:59,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:59,355 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 02:17:59,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:59,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720201703] [2021-11-07 02:17:59,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720201703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:59,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:59,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:17:59,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516986376] [2021-11-07 02:17:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:17:59,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:17:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:59,382 INFO L87 Difference]: Start difference. First operand has 231 states, 224 states have (on average 1.71875) internal successors, (385), 230 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:59,440 INFO L93 Difference]: Finished difference Result 460 states and 768 transitions. [2021-11-07 02:17:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:17:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 02:17:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:59,455 INFO L225 Difference]: With dead ends: 460 [2021-11-07 02:17:59,455 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 02:17:59,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 02:17:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-07 02:17:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.3489583333333333) internal successors, (259), 197 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 02:17:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-11-07 02:17:59,510 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 9 [2021-11-07 02:17:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-11-07 02:17:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-11-07 02:17:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:17:59,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:59,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:59,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:59,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:17:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1042319138, now seen corresponding path program 1 times [2021-11-07 02:17:59,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:59,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551861302] [2021-11-07 02:17:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:59,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:59,733 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:59,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:00,295 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 02:18:00,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:00,479 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 02:18:00,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:00,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551861302] [2021-11-07 02:18:00,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551861302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:00,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:00,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:00,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159844797] [2021-11-07 02:18:00,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:00,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:00,504 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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 02:18:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:04,640 INFO L93 Difference]: Finished difference Result 502 states and 660 transitions. [2021-11-07 02:18:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 12 [2021-11-07 02:18:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:04,646 INFO L225 Difference]: With dead ends: 502 [2021-11-07 02:18:04,646 INFO L226 Difference]: Without dead ends: 304 [2021-11-07 02:18:04,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 02:18:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-07 02:18:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2021-11-07 02:18:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.3423728813559321) internal successors, (396), 300 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 02:18:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 396 transitions. [2021-11-07 02:18:04,673 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 396 transitions. Word has length 12 [2021-11-07 02:18:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:04,674 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 396 transitions. [2021-11-07 02:18:04,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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 02:18:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 396 transitions. [2021-11-07 02:18:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:18:04,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:04,676 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] [2021-11-07 02:18:04,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:04,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:04,892 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash 627335073, now seen corresponding path program 1 times [2021-11-07 02:18:04,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:04,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959315484] [2021-11-07 02:18:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:04,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:04,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:05,474 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 02:18:05,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:05,717 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 02:18:05,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:05,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959315484] [2021-11-07 02:18:05,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959315484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:05,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:05,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:18:05,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830383162] [2021-11-07 02:18:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:05,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:05,720 INFO L87 Difference]: Start difference. First operand 301 states and 396 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:05,986 INFO L93 Difference]: Finished difference Result 513 states and 674 transitions. [2021-11-07 02:18:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:18:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:05,991 INFO L225 Difference]: With dead ends: 513 [2021-11-07 02:18:06,003 INFO L226 Difference]: Without dead ends: 344 [2021-11-07 02:18:06,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 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 02:18:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-07 02:18:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 307. [2021-11-07 02:18:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.282392026578073) internal successors, (386), 306 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 02:18:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 386 transitions. [2021-11-07 02:18:06,077 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 386 transitions. Word has length 44 [2021-11-07 02:18:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:06,078 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 386 transitions. [2021-11-07 02:18:06,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 386 transitions. [2021-11-07 02:18:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:18:06,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:06,095 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] [2021-11-07 02:18:06,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:06,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:06,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash -317553387, now seen corresponding path program 1 times [2021-11-07 02:18:06,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:06,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889457340] [2021-11-07 02:18:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:06,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:06,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:06,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:07,042 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 02:18:07,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:07,781 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 02:18:07,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:07,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889457340] [2021-11-07 02:18:07,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889457340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:07,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:07,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 9 [2021-11-07 02:18:07,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778112466] [2021-11-07 02:18:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:18:07,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:07,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:18:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:18:07,785 INFO L87 Difference]: Start difference. First operand 307 states and 386 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:07,956 INFO L93 Difference]: Finished difference Result 505 states and 628 transitions. [2021-11-07 02:18:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:18:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:07,959 INFO L225 Difference]: With dead ends: 505 [2021-11-07 02:18:07,959 INFO L226 Difference]: Without dead ends: 330 [2021-11-07 02:18:07,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:18:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-07 02:18:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 295. [2021-11-07 02:18:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2664359861591696) internal successors, (366), 294 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 02:18:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 366 transitions. [2021-11-07 02:18:07,973 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 366 transitions. Word has length 44 [2021-11-07 02:18:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:07,974 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 366 transitions. [2021-11-07 02:18:07,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 366 transitions. [2021-11-07 02:18:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:18:07,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:07,977 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] [2021-11-07 02:18:07,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -575718825, now seen corresponding path program 1 times [2021-11-07 02:18:08,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:08,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089316244] [2021-11-07 02:18:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:08,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:08,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:08,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:08,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:08,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:08,675 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:18:08,676 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 02:18:08,764 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:18:08,766 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 02:18:08,889 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 02:18:08,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:09,083 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 02:18:09,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:09,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089316244] [2021-11-07 02:18:09,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089316244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:09,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:09,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:09,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76429851] [2021-11-07 02:18:09,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:09,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:09,085 INFO L87 Difference]: Start difference. First operand 295 states and 366 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:19,826 INFO L93 Difference]: Finished difference Result 620 states and 749 transitions. [2021-11-07 02:18:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:19,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:18:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:19,832 INFO L225 Difference]: With dead ends: 620 [2021-11-07 02:18:19,832 INFO L226 Difference]: Without dead ends: 456 [2021-11-07 02:18:19,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:18:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-07 02:18:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 294. [2021-11-07 02:18:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.2638888888888888) internal successors, (364), 293 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:18:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 364 transitions. [2021-11-07 02:18:19,855 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 364 transitions. Word has length 44 [2021-11-07 02:18:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 364 transitions. [2021-11-07 02:18:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 364 transitions. [2021-11-07 02:18:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:18:19,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:19,864 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] [2021-11-07 02:18:19,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:18:20,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:20,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash 474525043, now seen corresponding path program 1 times [2021-11-07 02:18:20,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:20,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986715330] [2021-11-07 02:18:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:20,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:20,095 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:20,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:21,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:21,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:21,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986715330] [2021-11-07 02:18:21,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986715330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:21,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:21,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:18:21,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559451482] [2021-11-07 02:18:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:21,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:21,648 INFO L87 Difference]: Start difference. First operand 294 states and 364 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:21,910 INFO L93 Difference]: Finished difference Result 587 states and 733 transitions. [2021-11-07 02:18:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:18:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:21,914 INFO L225 Difference]: With dead ends: 587 [2021-11-07 02:18:21,914 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 02:18:21,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 02:18:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 02:18:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-07 02:18:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.2040816326530612) internal successors, (354), 299 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 02:18:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 354 transitions. [2021-11-07 02:18:21,952 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 354 transitions. Word has length 71 [2021-11-07 02:18:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 354 transitions. [2021-11-07 02:18:21,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 354 transitions. [2021-11-07 02:18:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:18:21,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:21,961 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] [2021-11-07 02:18:22,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:22,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -147792665, now seen corresponding path program 1 times [2021-11-07 02:18:22,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:22,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286564937] [2021-11-07 02:18:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:22,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:22,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:22,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:23,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:23,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:23,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286564937] [2021-11-07 02:18:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286564937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:23,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:23,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259523339] [2021-11-07 02:18:23,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:23,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:23,697 INFO L87 Difference]: Start difference. First operand 300 states and 354 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:23,840 INFO L93 Difference]: Finished difference Result 558 states and 665 transitions. [2021-11-07 02:18:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:18:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:23,844 INFO L225 Difference]: With dead ends: 558 [2021-11-07 02:18:23,844 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 02:18:23,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 02:18:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 02:18:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-07 02:18:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.202020202020202) internal successors, (357), 302 states have internal predecessors, (357), 0 states have call successors, (0), 0 states 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 02:18:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 357 transitions. [2021-11-07 02:18:23,891 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 357 transitions. Word has length 71 [2021-11-07 02:18:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:23,892 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 357 transitions. [2021-11-07 02:18:23,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 357 transitions. [2021-11-07 02:18:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:18:23,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:23,894 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 02:18:23,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:24,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:24,108 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1065048653, now seen corresponding path program 1 times [2021-11-07 02:18:24,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:24,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855463144] [2021-11-07 02:18:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:24,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:24,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:24,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:18:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:25,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:25,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:25,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855463144] [2021-11-07 02:18:25,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855463144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:25,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479075744] [2021-11-07 02:18:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:25,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:25,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:25,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:18:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:27,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:27,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479075744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:27,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135702158] [2021-11-07 02:18:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:18:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:27,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:18:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 02:18:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:28,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:28,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:28,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:18:28,524 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:18:28,525 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 02:18:28,620 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:18:28,620 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 02:18:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:28,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135702158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:28,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:18:28,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:18:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970127] [2021-11-07 02:18:28,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:28,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:18:28,861 INFO L87 Difference]: Start difference. First operand 303 states and 357 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 02:18:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:36,458 INFO L93 Difference]: Finished difference Result 465 states and 547 transitions. [2021-11-07 02:18:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:18:36,460 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 74 [2021-11-07 02:18:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:36,462 INFO L225 Difference]: With dead ends: 465 [2021-11-07 02:18:36,463 INFO L226 Difference]: Without dead ends: 440 [2021-11-07 02:18:36,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:18:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-07 02:18:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 305. [2021-11-07 02:18:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 299 states have (on average 1.2006688963210703) internal successors, (359), 304 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 02:18:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 359 transitions. [2021-11-07 02:18:36,478 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 359 transitions. Word has length 74 [2021-11-07 02:18:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:36,479 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 359 transitions. [2021-11-07 02:18:36,479 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 02:18:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 359 transitions. [2021-11-07 02:18:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:18:36,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:36,480 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:36,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:36,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:36,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:37,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -786181332, now seen corresponding path program 1 times [2021-11-07 02:18:37,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:37,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396720689] [2021-11-07 02:18:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:37,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:37,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:37,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:18:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:38,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:38,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396720689] [2021-11-07 02:18:38,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396720689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:38,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855087037] [2021-11-07 02:18:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:38,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:38,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:38,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:18:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:18:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:18:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855087037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:41,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:41,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:18:41,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882118813] [2021-11-07 02:18:41,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:41,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:41,146 INFO L87 Difference]: Start difference. First operand 305 states and 359 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 02:18:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:47,074 INFO L93 Difference]: Finished difference Result 692 states and 822 transitions. [2021-11-07 02:18:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2021-11-07 02:18:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:47,079 INFO L225 Difference]: With dead ends: 692 [2021-11-07 02:18:47,079 INFO L226 Difference]: Without dead ends: 432 [2021-11-07 02:18:47,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:18:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-07 02:18:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 380. [2021-11-07 02:18:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.2005347593582887) internal successors, (449), 379 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 02:18:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 449 transitions. [2021-11-07 02:18:47,116 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 449 transitions. Word has length 106 [2021-11-07 02:18:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:47,118 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 449 transitions. [2021-11-07 02:18:47,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 02:18:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 449 transitions. [2021-11-07 02:18:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 02:18:47,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:47,126 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:47,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:47,546 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash 530496366, now seen corresponding path program 1 times [2021-11-07 02:18:47,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:47,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75102920] [2021-11-07 02:18:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:47,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:47,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:47,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:18:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:48,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:48,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75102920] [2021-11-07 02:18:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75102920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:48,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897539284] [2021-11-07 02:18:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:48,989 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:48,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:48,990 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:48,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:18:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:50,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897539284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:51,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4287076] [2021-11-07 02:18:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:51,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:18:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:51,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:18:51,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:18:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:52,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:52,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:52,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4287076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:52,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:18:52,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 02:18:52,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002867061] [2021-11-07 02:18:52,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:18:52,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:18:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:52,922 INFO L87 Difference]: Start difference. First operand 380 states and 449 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 02:18:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:53,483 INFO L93 Difference]: Finished difference Result 718 states and 859 transitions. [2021-11-07 02:18:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:18:53,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 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 113 [2021-11-07 02:18:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:53,502 INFO L225 Difference]: With dead ends: 718 [2021-11-07 02:18:53,503 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 02:18:53,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:18:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 02:18:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-07 02:18:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.1963350785340314) internal successors, (457), 387 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 02:18:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 457 transitions. [2021-11-07 02:18:53,549 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 457 transitions. Word has length 113 [2021-11-07 02:18:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:53,550 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 457 transitions. [2021-11-07 02:18:53,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 02:18:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 457 transitions. [2021-11-07 02:18:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 02:18:53,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:53,552 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:53,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:53,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:53,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:54,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:18:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1097324242, now seen corresponding path program 2 times [2021-11-07 02:18:54,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:54,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969468332] [2021-11-07 02:18:54,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:18:54,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:54,164 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:54,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:18:55,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:18:55,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:18:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:18:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:18:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:18:57,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:57,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969468332] [2021-11-07 02:18:57,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969468332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:57,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1796543808] [2021-11-07 02:18:57,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:18:57,259 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:57,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:57,259 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:57,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:18:58,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:18:58,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:18:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:18:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:18:59,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:18:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1796543808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424214072] [2021-11-07 02:18:59,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:18:59,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:18:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:59,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:18:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:19:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:19:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:19:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:19:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:19:00,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:19:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424214072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:02,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:19:02,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 8] total 27 [2021-11-07 02:19:02,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976863038] [2021-11-07 02:19:02,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 02:19:02,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 02:19:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:19:02,037 INFO L87 Difference]: Start difference. First operand 388 states and 457 transitions. Second operand has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 02:19:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:07,413 INFO L93 Difference]: Finished difference Result 1066 states and 1283 transitions. [2021-11-07 02:19:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 02:19:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 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 121 [2021-11-07 02:19:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:07,437 INFO L225 Difference]: With dead ends: 1066 [2021-11-07 02:19:07,437 INFO L226 Difference]: Without dead ends: 732 [2021-11-07 02:19:07,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 02:19:07,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-07 02:19:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 410. [2021-11-07 02:19:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 404 states have (on average 1.188118811881188) internal successors, (480), 409 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 02:19:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 480 transitions. [2021-11-07 02:19:07,507 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 480 transitions. Word has length 121 [2021-11-07 02:19:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:07,508 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 480 transitions. [2021-11-07 02:19:07,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 02:19:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 480 transitions. [2021-11-07 02:19:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 02:19:07,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:07,511 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:07,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:07,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:19:07,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:08,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:08,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:19:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:08,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1558698834, now seen corresponding path program 3 times [2021-11-07 02:19:08,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921113607] [2021-11-07 02:19:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:19:08,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:08,134 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:08,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:19:14,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 02:19:14,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:19:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:19:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:19:15,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:19:16,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:16,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921113607] [2021-11-07 02:19:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921113607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:16,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950174514] [2021-11-07 02:19:16,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:19:16,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:16,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:16,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:20:28,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 02:20:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:20:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:20:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 02:20:30,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1950174514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:30,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241141888] [2021-11-07 02:20:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:20:30,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:30,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:20:30,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33bfad03-0ada-4784-ae7c-57a0c63ec633/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process