./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-memleak_nexttime.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/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_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-memleak_nexttime.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:04,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:04,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:04,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:04,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:04,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:04,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:04,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:04,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:04,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:04,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:04,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:04,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:04,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:04,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:04,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:04,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:04,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:04,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:04,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:04,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:04,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:04,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:04,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:04,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:04,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:04,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:04,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:04,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:04,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:04,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:04,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:04,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:04,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:04,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:04,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:04,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:04,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:04,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:04,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:04,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:04,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:08:04,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:04,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:04,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:04,772 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:04,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:04,772 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:04,773 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:04,773 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:04,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:04,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:04,774 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:04,775 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:04,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:04,775 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:04,775 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:04,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:08:04,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:08:04,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:04,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:04,778 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:08:04,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:04,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:04,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:04,779 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:08:04,779 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:08:04,779 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:08:04,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:04,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:04,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:04,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:04,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:04,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:04,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:04,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:04,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:04,783 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:04,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:04,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:04,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:04,784 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_9d357830-8d4c-4121-bd41-e4613bff81d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b [2021-11-07 01:08:05,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:05,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:05,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:05,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:05,093 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:05,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-11-07 01:08:05,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/a95ee646b/028c677576dd47e3b4d385fa2f20056a/FLAG6a98da036 [2021-11-07 01:08:05,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:05,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-11-07 01:08:05,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/a95ee646b/028c677576dd47e3b4d385fa2f20056a/FLAG6a98da036 [2021-11-07 01:08:06,020 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/a95ee646b/028c677576dd47e3b4d385fa2f20056a [2021-11-07 01:08:06,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:06,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:06,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:06,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:06,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:06,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:06" (1/1) ... [2021-11-07 01:08:06,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba704b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:06, skipping insertion in model container [2021-11-07 01:08:06,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:06" (1/1) ... [2021-11-07 01:08:06,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:06,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:06,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:06,397 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 01:08:06,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70aa9039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:06, skipping insertion in model container [2021-11-07 01:08:06,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:06,398 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:06,400 INFO L168 Benchmark]: Toolchain (without parser) took 375.81 ms. Allocated memory is still 94.4 MB. Free memory was 73.0 MB in the beginning and 66.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:06,401 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:06,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.76 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 67.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:06,403 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 373.76 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 67.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 643]: 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_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/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_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-memleak_nexttime.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:08,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:08,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:08,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:08,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:08,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:08,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:08,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:08,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:08,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:08,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:08,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:08,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:08,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:08,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:08,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:08,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:08,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:08,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:08,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:08,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:08,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:08,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:08,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:08,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:08,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:08,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:08,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:08,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:08,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:08,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:08,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:08,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:08,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:08,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:08,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:08,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:08,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:08,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:08,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:08,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:08,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:08:08,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:08,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:08,766 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:08,766 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:08,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:08,767 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:08,767 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:08,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:08,767 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:08,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:08:08,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:08:08,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:08,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:08,771 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:08:08,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:08,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:08,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:08,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:08,772 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:08,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:08,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:08,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:08,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:08,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:08,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:08,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:08,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:08,774 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:08,775 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:08,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:08,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:08,775 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_9d357830-8d4c-4121-bd41-e4613bff81d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b [2021-11-07 01:08:09,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:09,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:09,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:09,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:09,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:09,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-11-07 01:08:09,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/554e08d24/d8822e3054d2440c8af086e1dde00d17/FLAGd405a603a [2021-11-07 01:08:09,894 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:09,899 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-11-07 01:08:09,922 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/554e08d24/d8822e3054d2440c8af086e1dde00d17/FLAGd405a603a [2021-11-07 01:08:10,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/data/554e08d24/d8822e3054d2440c8af086e1dde00d17 [2021-11-07 01:08:10,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:10,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:10,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:10,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:10,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:10,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a54e5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10, skipping insertion in model container [2021-11-07 01:08:10,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:10,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:10,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:10,585 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:10,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:10,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:10,618 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:10,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:10,709 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:10,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10 WrapperNode [2021-11-07 01:08:10,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:10,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:10,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:10,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:10,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:10,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:10,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:10,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:10,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:10,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:10,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:10,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:10,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (1/1) ... [2021-11-07 01:08:10,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:10,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:10,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:10,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:10,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:08:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:08:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:08:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:08:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:08:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:08:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:08:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:08:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:10,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:08:11,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:08:11,339 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 01:08:11,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:11 BoogieIcfgContainer [2021-11-07 01:08:11,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:08:11,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:08:11,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:08:11,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:08:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:10" (1/3) ... [2021-11-07 01:08:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765ce24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:11, skipping insertion in model container [2021-11-07 01:08:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:10" (2/3) ... [2021-11-07 01:08:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765ce24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:11, skipping insertion in model container [2021-11-07 01:08:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:11" (3/3) ... [2021-11-07 01:08:11,349 INFO L111 eAbstractionObserver]: Analyzing ICFG test-memleak_nexttime.i [2021-11-07 01:08:11,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:08:11,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-07 01:08:11,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:08:11,429 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:08:11,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-07 01:08:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 01:08:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:08:11,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:11,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:08:11,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-11-07 01:08:11,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:11,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736258717] [2021-11-07 01:08:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:11,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:11,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:08:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:08:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:11,803 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:08:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:08:12,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-07 01:08:12,218 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-07 01:08:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 35 [2021-11-07 01:08:12,317 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 01:08:12,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-07 01:08:14,449 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 01:08:14,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:14,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736258717] [2021-11-07 01:08:14,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736258717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:14,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:14,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:08:14,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629122042] [2021-11-07 01:08:14,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-11-07 01:08:14,481 INFO L87 Difference]: Start difference. First operand has 38 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 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 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:14,811 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-07 01:08:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:08:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:08:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:14,820 INFO L225 Difference]: With dead ends: 36 [2021-11-07 01:08:14,821 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 01:08:14,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:08:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 01:08:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 01:08:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 01:08:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-07 01:08:14,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 3 [2021-11-07 01:08:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:14,861 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-07 01:08:14,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-07 01:08:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:08:14,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:14,862 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:08:14,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:15,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:15,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-11-07 01:08:15,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:15,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509608069] [2021-11-07 01:08:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:15,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:15,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:15,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:08:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:15,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:08:15,188 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:08:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-11-07 01:08:15,218 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 01:08:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:15,247 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 01:08:15,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:15,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509608069] [2021-11-07 01:08:15,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509608069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:15,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:15,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488976142] [2021-11-07 01:08:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:08:15,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:08:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:15,256 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 01:08:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:15,364 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-11-07 01:08:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:08:15,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-07 01:08:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:15,366 INFO L225 Difference]: With dead ends: 33 [2021-11-07 01:08:15,366 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 01:08:15,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 01:08:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 01:08:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 01:08:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-07 01:08:15,371 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 4 [2021-11-07 01:08:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:15,372 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-07 01:08:15,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 01:08:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-07 01:08:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:08:15,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:15,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:08:15,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:15,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash 28692770, now seen corresponding path program 1 times [2021-11-07 01:08:15,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:15,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603496071] [2021-11-07 01:08:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:15,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:15,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:15,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:08:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:08:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:15,751 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-07 01:08:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-11-07 01:08:15,836 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:08:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 63 [2021-11-07 01:08:16,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-07 01:08:16,418 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-07 01:08:16,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 62 treesize of output 115 [2021-11-07 01:08:16,520 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-11-07 01:08:16,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 112 treesize of output 145 [2021-11-07 01:08:19,079 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 01:08:19,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:19,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-07 01:08:19,340 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 01:08:19,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:19,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603496071] [2021-11-07 01:08:19,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603496071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:19,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:19,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:08:19,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680110036] [2021-11-07 01:08:19,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:19,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:08:19,343 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:27,070 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-07 01:08:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:08:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:27,072 INFO L225 Difference]: With dead ends: 31 [2021-11-07 01:08:27,072 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 01:08:27,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=29, Invalid=42, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:08:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 01:08:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 01:08:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-07 01:08:27,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-11-07 01:08:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:27,077 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-07 01:08:27,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-07 01:08:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:08:27,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:27,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:08:27,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:08:27,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:27,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash 889475910, now seen corresponding path program 1 times [2021-11-07 01:08:27,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:27,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314985621] [2021-11-07 01:08:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:27,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:27,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:27,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:08:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:08:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:27,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-07 01:08:27,421 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:08:27,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-11-07 01:08:27,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-07 01:08:27,559 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 01:08:27,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:27,703 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 01:08:27,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:27,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314985621] [2021-11-07 01:08:27,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314985621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:27,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:27,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:08:27,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665433222] [2021-11-07 01:08:27,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:08:27,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:08:27,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:08:27,706 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:27,897 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-07 01:08:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:08:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:08:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:27,899 INFO L225 Difference]: With dead ends: 30 [2021-11-07 01:08:27,899 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 01:08:27,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:08:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 01:08:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 01:08:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:08:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-07 01:08:27,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2021-11-07 01:08:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:27,904 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-07 01:08:27,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-07 01:08:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:08:27,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:27,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:27,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:08:28,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:28,115 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -811376880, now seen corresponding path program 1 times [2021-11-07 01:08:28,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:28,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775063628] [2021-11-07 01:08:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:28,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:28,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:28,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:08:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:28,276 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 01:08:28,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:28,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:28,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775063628] [2021-11-07 01:08:28,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775063628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:28,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:28,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:08:28,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534103589] [2021-11-07 01:08:28,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:28,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:08:28,341 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:28,456 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-07 01:08:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:08:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:08:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:28,458 INFO L225 Difference]: With dead ends: 34 [2021-11-07 01:08:28,458 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 01:08:28,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:08:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 01:08:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 01:08:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 01:08:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-07 01:08:28,462 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 12 [2021-11-07 01:08:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:28,462 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-07 01:08:28,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-07 01:08:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:08:28,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:28,463 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:28,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:08:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:28,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -277697776, now seen corresponding path program 1 times [2021-11-07 01:08:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214817288] [2021-11-07 01:08:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:28,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:28,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:28,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:08:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:08:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:28,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:29,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:29,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214817288] [2021-11-07 01:08:29,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214817288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:29,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658314507] [2021-11-07 01:08:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:29,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:08:29,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:08:29,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:08:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:08:29,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:08:29,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658314507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:29,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:08:29,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 13 [2021-11-07 01:08:29,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663292586] [2021-11-07 01:08:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:29,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:29,327 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:29,425 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-07 01:08:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:08:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:08:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:29,427 INFO L225 Difference]: With dead ends: 36 [2021-11-07 01:08:29,427 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 01:08:29,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 01:08:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 01:08:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 01:08:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-07 01:08:29,432 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2021-11-07 01:08:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:29,432 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-07 01:08:29,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-07 01:08:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:29,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:29,433 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:29,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:29,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:29,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:29,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash -77863314, now seen corresponding path program 1 times [2021-11-07 01:08:29,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:29,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874570071] [2021-11-07 01:08:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:29,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:29,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:29,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:08:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:08:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:30,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874570071] [2021-11-07 01:08:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874570071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:30,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1100920590] [2021-11-07 01:08:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:30,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:08:30,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:08:30,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:08:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:08:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1100920590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:30,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747046135] [2021-11-07 01:08:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:30,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:08:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:30,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:08:30,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:08:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:08:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:08:30,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747046135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:30,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:08:30,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 01:08:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235585021] [2021-11-07 01:08:30,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:08:30,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:08:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:30,837 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:08:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:31,170 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-07 01:08:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:08:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-11-07 01:08:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:31,172 INFO L225 Difference]: With dead ends: 44 [2021-11-07 01:08:31,172 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 01:08:31,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:08:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 01:08:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 01:08:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-07 01:08:31,179 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 15 [2021-11-07 01:08:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:31,179 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-07 01:08:31,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 01:08:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-07 01:08:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:08:31,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:31,180 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:31,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:31,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 01:08:31,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:31,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:31,781 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1212605842, now seen corresponding path program 2 times [2021-11-07 01:08:31,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:31,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900910746] [2021-11-07 01:08:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:08:31,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:31,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:08:31,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:08:31,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:08:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:08:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:32,014 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:08:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:08:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 01:08:32,274 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-07 01:08:32,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 36 [2021-11-07 01:08:32,572 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-07 01:08:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 30 [2021-11-07 01:08:32,656 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-11-07 01:08:32,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-11-07 01:08:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:08:32,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:34,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-11-07 01:08:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:08:34,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:34,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900910746] [2021-11-07 01:08:34,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900910746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:34,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:34,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:08:34,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277469690] [2021-11-07 01:08:34,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:08:34,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:08:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=46, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:08:34,934 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 01:08:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:47,255 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-07 01:08:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 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 17 [2021-11-07 01:08:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:47,256 INFO L225 Difference]: With dead ends: 43 [2021-11-07 01:08:47,256 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:08:47,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=44, Invalid=87, Unknown=1, NotChecked=0, Total=132 [2021-11-07 01:08:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:08:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 01:08:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-07 01:08:47,261 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 17 [2021-11-07 01:08:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-07 01:08:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 01:08:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-07 01:08:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:08:47,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:47,263 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:47,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:47,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:47,463 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1378074960, now seen corresponding path program 1 times [2021-11-07 01:08:47,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:47,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686032209] [2021-11-07 01:08:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:47,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:47,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:47,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:47,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:08:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:08:47,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:08:47,747 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:08:47,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 01:08:48,105 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-11-07 01:08:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 40 [2021-11-07 01:08:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:08:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-11-07 01:08:48,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 607 treesize of output 595 [2021-11-07 01:08:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:08:49,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:49,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686032209] [2021-11-07 01:08:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686032209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:49,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:08:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498987000] [2021-11-07 01:08:49,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:08:49,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:08:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:08:49,665 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 01:08:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:50,269 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-07 01:08:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:08:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:08:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:50,271 INFO L225 Difference]: With dead ends: 42 [2021-11-07 01:08:50,271 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 01:08:50,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:08:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 01:08:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-07 01:08:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-07 01:08:50,274 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2021-11-07 01:08:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:50,274 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-07 01:08:50,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 01:08:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-07 01:08:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:08:50,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:50,276 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:50,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:50,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:50,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1689464347, now seen corresponding path program 1 times [2021-11-07 01:08:50,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:50,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888257710] [2021-11-07 01:08:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:50,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:50,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:50,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:50,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:08:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:08:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:08:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:08:50,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:08:50,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:50,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888257710] [2021-11-07 01:08:50,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888257710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:50,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:50,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:50,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820386960] [2021-11-07 01:08:50,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:08:50,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:08:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:50,930 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:50,999 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-07 01:08:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:08:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 01:08:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:51,002 INFO L225 Difference]: With dead ends: 41 [2021-11-07 01:08:51,002 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 01:08:51,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 01:08:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-07 01:08:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 01:08:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-07 01:08:51,005 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2021-11-07 01:08:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-07 01:08:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-07 01:08:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:08:51,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:51,007 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:51,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:51,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:51,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1689464348, now seen corresponding path program 1 times [2021-11-07 01:08:51,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:51,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282633643] [2021-11-07 01:08:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:51,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:51,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:51,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:08:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:51,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:08:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:08:51,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 01:08:51,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:51,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282633643] [2021-11-07 01:08:51,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282633643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:51,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:51,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:08:51,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113840167] [2021-11-07 01:08:51,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:08:51,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:08:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:08:51,864 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:08:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:51,946 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-07 01:08:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:08:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 28 [2021-11-07 01:08:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:51,948 INFO L225 Difference]: With dead ends: 40 [2021-11-07 01:08:51,948 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 01:08:51,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 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 01:08:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 01:08:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-07 01:08:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 01:08:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-07 01:08:51,951 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 28 [2021-11-07 01:08:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:51,952 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-07 01:08:51,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:08:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-07 01:08:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:08:51,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:51,953 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:51,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:52,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:52,163 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2021-11-07 01:08:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash 833787226, now seen corresponding path program 1 times [2021-11-07 01:08:52,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:52,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519620145] [2021-11-07 01:08:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:52,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:52,165 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:08:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:08:52,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:52,629 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:08:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:08:52,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 01:08:52,883 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-07 01:08:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2021-11-07 01:08:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 01:08:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-07 01:08:53,670 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-07 01:08:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 51 [2021-11-07 01:08:53,770 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-07 01:08:53,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 53 [2021-11-07 01:08:54,114 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-07 01:08:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 35 [2021-11-07 01:08:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:54,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:54,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:08:54,441 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 01:08:54,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-07 01:08:54,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:08:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-07 01:08:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:08:54,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:54,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:08:54,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-07 01:08:58,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:58,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519620145] [2021-11-07 01:08:58,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr10|] [2021-11-07 01:08:58,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673736959] [2021-11-07 01:08:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:58,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:08:58,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:08:58,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:08:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:08:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:59,807 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:08:59,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:08:59,971 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:08:59,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:09:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:00,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:00,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-07 01:09:00,786 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:09:00,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 43 [2021-11-07 01:09:00,891 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-07 01:09:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 51 [2021-11-07 01:09:01,156 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-07 01:09:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 35 [2021-11-07 01:09:01,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:01,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:01,393 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 01:09:01,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-07 01:09:01,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:09:01,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-07 01:09:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:09:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:01,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:01,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-07 01:09:03,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr10|] [2021-11-07 01:09:03,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856350344] [2021-11-07 01:09:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:03,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:09:03,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:03,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:09:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:09:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:09:04,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:04,176 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:09:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:09:04,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:09:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-11-07 01:09:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:04,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:04,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:04,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-07 01:09:04,891 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:09:04,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 41 [2021-11-07 01:09:04,987 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-07 01:09:04,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 51 [2021-11-07 01:09:05,305 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-07 01:09:05,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 35 [2021-11-07 01:09:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:05,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-07 01:09:05,544 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 01:09:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-07 01:09:05,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:09:05,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-07 01:09:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:09:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:05,669 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:05,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-07 01:09:08,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr10|] [2021-11-07 01:09:08,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:08,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:09:08,002 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-07 01:09:08,003 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:09:08,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:09:08,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:09:08,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:09:08,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK [2021-11-07 01:09:08,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:08,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:09:08,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:09:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:08,625 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:08,627 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:09:08,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:09:08 BoogieIcfgContainer [2021-11-07 01:09:08,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:09:08,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:09:08,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:09:08,639 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:09:08,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:11" (3/4) ... [2021-11-07 01:09:08,642 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:09:08,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:09:08,644 INFO L168 Benchmark]: Toolchain (without parser) took 58453.18 ms. Allocated memory was 50.3 MB in the beginning and 98.6 MB in the end (delta: 48.2 MB). Free memory was 25.4 MB in the beginning and 70.2 MB in the end (delta: -44.8 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,644 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:08,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.80 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 25.2 MB in the beginning and 42.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.80 ms. Allocated memory is still 67.1 MB. Free memory was 42.4 MB in the beginning and 40.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,645 INFO L168 Benchmark]: Boogie Preprocessor took 32.79 ms. Allocated memory is still 67.1 MB. Free memory was 40.3 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,645 INFO L168 Benchmark]: RCFGBuilder took 543.63 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 40.5 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,646 INFO L168 Benchmark]: TraceAbstraction took 57295.35 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 40.2 MB in the beginning and 70.2 MB in the end (delta: -30.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:08,646 INFO L168 Benchmark]: Witness Printer took 4.16 ms. Allocated memory is still 98.6 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:08,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 516.80 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 25.2 MB in the beginning and 42.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.80 ms. Allocated memory is still 67.1 MB. Free memory was 42.4 MB in the beginning and 40.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.79 ms. Allocated memory is still 67.1 MB. Free memory was 40.3 MB in the beginning and 38.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 543.63 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 40.5 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 57295.35 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 40.2 MB in the beginning and 70.2 MB in the end (delta: -30.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.16 ms. Allocated memory is still 98.6 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 651]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L640] char a[sizeof(int*)]; [L643] int *p = (int *)malloc(10); [L643] int *p = (int *)malloc(10); [L643] int *p = (int *)malloc(10); [L649] void *p; [L651] EXPR \read(*p) [L651] free(p) - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 651]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 651]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 651]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 651]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 646]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 57.2s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 22.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 194 SDtfs, 425 SDslu, 254 SDs, 0 SdLazy, 514 SolverSat, 97 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 18.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 305 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=7, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 20.0s InterpolantComputationTime, 224 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 390 ConstructedInterpolants, 52 QuantifiedInterpolants, 3524 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1367 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 29 InterpolantComputations, 20 PerfectInterpolantSequences, 156/190 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:09:08,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d357830-8d4c-4121-bd41-e4613bff81d6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN