./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:04,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:04,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:30:04,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:04,657 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:04,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:04,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:04,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:04,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:04,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:04,704 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:04,704 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:04,704 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:04,706 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:30:04,707 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:04,707 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:04,707 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:30:04,708 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:30:04,708 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:04,709 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:30:04,709 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:30:04,710 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:30:04,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:30:04,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:30:04,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:04,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:30:04,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:04,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:30:04,714 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:04,714 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:30:04,716 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:30:04,716 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:30:04,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:04,717 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:30:04,717 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:30:04,717 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:30:04,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:04,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:04,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:04,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:04,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:04,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:04,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:04,719 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:30:04,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:30:04,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:04,721 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:04,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:04,721 INFO L153 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_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2023-11-23 21:30:05,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:05,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:05,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:05,065 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:05,066 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:05,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2023-11-23 21:30:08,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:08,543 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:08,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2023-11-23 21:30:08,565 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/fa9f3e6da/601f5fa43f2d4144a30878f34a218ff9/FLAGeeb9399e1 [2023-11-23 21:30:08,581 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/fa9f3e6da/601f5fa43f2d4144a30878f34a218ff9 [2023-11-23 21:30:08,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:08,585 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:08,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:08,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:08,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:08,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:08" (1/1) ... [2023-11-23 21:30:08,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bab9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:08, skipping insertion in model container [2023-11-23 21:30:08,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:08" (1/1) ... [2023-11-23 21:30:08,655 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:09,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:09,238 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-23 21:30:09,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5af2381e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:09, skipping insertion in model container [2023-11-23 21:30:09,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:09,239 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 21:30:09,241 INFO L158 Benchmark]: Toolchain (without parser) took 654.68ms. Allocated memory is still 184.5MB. Free memory was 141.9MB in the beginning and 127.6MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:30:09,242 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:30:09,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 651.96ms. Allocated memory is still 184.5MB. Free memory was 141.5MB in the beginning and 127.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:30:09,245 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 651.96ms. Allocated memory is still 184.5MB. Free memory was 141.5MB in the beginning and 127.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:11,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:11,766 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 21:30:11,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:11,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:11,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:11,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:11,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:11,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:11,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:11,805 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:11,805 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:11,806 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:11,806 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:11,807 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:11,808 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:11,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:30:11,809 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:30:11,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:11,810 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:30:11,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:11,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:30:11,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:11,812 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:30:11,813 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:30:11,813 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:30:11,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:11,814 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:30:11,815 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:30:11,815 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:30:11,816 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:30:11,816 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:30:11,817 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:11,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:11,817 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:30:11,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:11,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:11,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:11,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:11,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:11,819 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:30:11,820 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:11,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:11,820 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:11,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:11,821 INFO L153 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_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2023-11-23 21:30:12,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:12,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:12,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:12,313 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:12,314 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:12,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2023-11-23 21:30:15,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:15,817 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:15,817 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2023-11-23 21:30:15,836 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/f22ee36fb/1b6d58456ff6458eaf19694d4f8b6eb2/FLAG039c7274f [2023-11-23 21:30:15,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/data/f22ee36fb/1b6d58456ff6458eaf19694d4f8b6eb2 [2023-11-23 21:30:15,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:15,859 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:15,860 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:15,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:15,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:15,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:15" (1/1) ... [2023-11-23 21:30:15,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@94400ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:15, skipping insertion in model container [2023-11-23 21:30:15,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:15" (1/1) ... [2023-11-23 21:30:15,959 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:16,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:16,535 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 21:30:16,550 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:16,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:16,653 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:30:16,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:16,856 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:16,866 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:30:16,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16 WrapperNode [2023-11-23 21:30:16,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:16,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:16,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:30:16,869 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:30:16,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:16,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:16,969 INFO L138 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 77 [2023-11-23 21:30:16,970 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:16,971 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:30:16,971 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:30:16,971 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:30:16,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:16,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:30:17,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:30:17,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:30:17,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:30:17,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:17,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:17,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:30:17,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:30:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2023-11-23 21:30:17,117 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2023-11-23 21:30:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:30:17,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:30:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:30:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:30:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:30:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:30:17,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:30:17,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:30:17,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:30:17,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:30:17,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:30:17,268 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:30:17,270 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:30:17,636 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:30:17,686 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:30:17,687 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:30:17,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:17 BoogieIcfgContainer [2023-11-23 21:30:17,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:30:17,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:30:17,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:30:17,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:30:17,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:30:15" (1/3) ... [2023-11-23 21:30:17,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@def78b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:17, skipping insertion in model container [2023-11-23 21:30:17,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16" (2/3) ... [2023-11-23 21:30:17,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@def78b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:17, skipping insertion in model container [2023-11-23 21:30:17,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:17" (3/3) ... [2023-11-23 21:30:17,696 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test19-1.i [2023-11-23 21:30:17,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:30:17,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-23 21:30:17,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:30:17,789 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67fb467a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:30:17,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-23 21:30:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 32 states have (on average 1.9375) internal successors, (62), 57 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:30:17,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:17,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:17,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 68145424, now seen corresponding path program 1 times [2023-11-23 21:30:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:17,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558701140] [2023-11-23 21:30:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:17,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:17,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:17,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:30:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:17,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:30:17,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:18,105 INFO L378 Elim1Store]: Elim1 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 7 [2023-11-23 21:30:18,171 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-23 21:30:18,227 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:30:18,228 INFO L378 Elim1Store]: Elim1 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 14 treesize of output 20 [2023-11-23 21:30:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:18,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:18,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558701140] [2023-11-23 21:30:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558701140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:18,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:18,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808662999] [2023-11-23 21:30:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:30:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:30:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-11-23 21:30:18,308 INFO L87 Difference]: Start difference. First operand has 63 states, 32 states have (on average 1.9375) internal successors, (62), 57 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:18,607 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-23 21:30:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-23 21:30:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:18,620 INFO L225 Difference]: With dead ends: 78 [2023-11-23 21:30:18,620 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 21:30:18,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-11-23 21:30:18,625 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 37 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:18,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 125 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2023-11-23 21:30:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 21:30:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-11-23 21:30:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 61 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 21:30:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-23 21:30:18,679 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 7 [2023-11-23 21:30:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:18,680 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-23 21:30:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-23 21:30:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:30:18,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:18,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:18,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-23 21:30:18,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:18,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:18,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 68145425, now seen corresponding path program 1 times [2023-11-23 21:30:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855754410] [2023-11-23 21:30:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:18,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:18,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:18,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:30:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:18,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:30:18,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:18,992 INFO L378 Elim1Store]: Elim1 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 7 [2023-11-23 21:30:19,002 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:19,091 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 21:30:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:30:19,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-23 21:30:19,170 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:30:19,171 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:19,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:19,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855754410] [2023-11-23 21:30:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855754410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:19,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:19,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:30:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269957594] [2023-11-23 21:30:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-11-23 21:30:19,200 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:19,532 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-11-23 21:30:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:30:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-23 21:30:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:19,534 INFO L225 Difference]: With dead ends: 85 [2023-11-23 21:30:19,534 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 21:30:19,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-11-23 21:30:19,536 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 37 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:19,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 149 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 135 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2023-11-23 21:30:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 21:30:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2023-11-23 21:30:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 61 states have internal predecessors, (74), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:30:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-11-23 21:30:19,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 7 [2023-11-23 21:30:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:19,548 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-11-23 21:30:19,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-11-23 21:30:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:30:19,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:19,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:19,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:19,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:19,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:19,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1336438300, now seen corresponding path program 1 times [2023-11-23 21:30:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424674221] [2023-11-23 21:30:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:19,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:19,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:19,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:19,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 21:30:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:19,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:30:19,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:19,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 21:30:19,924 INFO L378 Elim1Store]: Elim1 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 20 treesize of output 8 [2023-11-23 21:30:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:19,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:19,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:19,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424674221] [2023-11-23 21:30:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424674221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:19,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238267079] [2023-11-23 21:30:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:19,951 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:20,102 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2023-11-23 21:30:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:30:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-23 21:30:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:20,105 INFO L225 Difference]: With dead ends: 77 [2023-11-23 21:30:20,105 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 21:30:20,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:20,107 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:20,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 272 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 21:30:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2023-11-23 21:30:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.75) internal successors, (77), 63 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:30:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2023-11-23 21:30:20,117 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 13 [2023-11-23 21:30:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:20,118 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2023-11-23 21:30:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2023-11-23 21:30:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:30:20,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:20,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:20,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-23 21:30:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:20,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:20,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1139924795, now seen corresponding path program 1 times [2023-11-23 21:30:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47028130] [2023-11-23 21:30:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:20,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:20,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-23 21:30:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:20,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:30:20,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:20,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:20,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47028130] [2023-11-23 21:30:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47028130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:30:20,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849935215] [2023-11-23 21:30:20,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:20,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:30:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:30:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:20,455 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:20,556 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-11-23 21:30:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:30:20,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-23 21:30:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:20,558 INFO L225 Difference]: With dead ends: 78 [2023-11-23 21:30:20,559 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 21:30:20,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:20,560 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:20,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 208 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 21:30:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2023-11-23 21:30:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.702127659574468) internal successors, (80), 66 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:30:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2023-11-23 21:30:20,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 13 [2023-11-23 21:30:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:20,570 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2023-11-23 21:30:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2023-11-23 21:30:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:30:20,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:20,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:20,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:20,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:20,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:20,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1285250171, now seen corresponding path program 1 times [2023-11-23 21:30:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697570120] [2023-11-23 21:30:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:20,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:20,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:20,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-23 21:30:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:20,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:30:20,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:20,891 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-23 21:30:20,944 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-23 21:30:20,978 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:30:20,980 INFO L378 Elim1Store]: Elim1 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 14 treesize of output 20 [2023-11-23 21:30:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:20,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:20,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:20,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697570120] [2023-11-23 21:30:20,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697570120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:20,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:20,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:30:20,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354515778] [2023-11-23 21:30:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:20,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2023-11-23 21:30:21,003 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:21,249 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2023-11-23 21:30:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:30:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-23 21:30:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:21,251 INFO L225 Difference]: With dead ends: 76 [2023-11-23 21:30:21,251 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 21:30:21,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2023-11-23 21:30:21,252 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:21,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 148 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2023-11-23 21:30:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 21:30:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2023-11-23 21:30:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 64 states have internal predecessors, (76), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:30:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2023-11-23 21:30:21,260 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 15 [2023-11-23 21:30:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2023-11-23 21:30:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2023-11-23 21:30:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:30:21,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:21,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:21,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:21,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:21,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:21,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1285250170, now seen corresponding path program 1 times [2023-11-23 21:30:21,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:21,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009794352] [2023-11-23 21:30:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:21,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:21,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:21,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-23 21:30:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:21,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:30:21,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:21,574 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-23 21:30:21,702 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 21:30:21,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:30:21,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-23 21:30:21,759 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:30:21,759 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:21,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:21,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009794352] [2023-11-23 21:30:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009794352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:21,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:21,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:30:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973763841] [2023-11-23 21:30:21,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:21,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:30:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:21,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:30:21,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2023-11-23 21:30:21,779 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:22,133 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2023-11-23 21:30:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:30:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-23 21:30:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:22,135 INFO L225 Difference]: With dead ends: 81 [2023-11-23 21:30:22,135 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 21:30:22,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=38, Unknown=1, NotChecked=12, Total=72 [2023-11-23 21:30:22,136 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 35 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:22,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 219 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2023-11-23 21:30:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 21:30:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2023-11-23 21:30:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 62 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:30:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-11-23 21:30:22,153 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 15 [2023-11-23 21:30:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:22,154 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-11-23 21:30:22,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-11-23 21:30:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:30:22,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:22,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:22,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-23 21:30:22,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:22,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:22,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:22,359 INFO L85 PathProgramCache]: Analyzing trace with hash 977945182, now seen corresponding path program 1 times [2023-11-23 21:30:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164807157] [2023-11-23 21:30:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:22,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:22,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-23 21:30:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:22,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:22,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:22,564 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_13| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_13| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_13|)))) is different from true [2023-11-23 21:30:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:22,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:22,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164807157] [2023-11-23 21:30:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164807157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23561703] [2023-11-23 21:30:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:22,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:30:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:30:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-11-23 21:30:22,567 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:22,767 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-11-23 21:30:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-23 21:30:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:22,770 INFO L225 Difference]: With dead ends: 99 [2023-11-23 21:30:22,770 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 21:30:22,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-11-23 21:30:22,771 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:22,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 156 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2023-11-23 21:30:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 21:30:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2023-11-23 21:30:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 67 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2023-11-23 21:30:22,779 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 14 [2023-11-23 21:30:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:22,779 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2023-11-23 21:30:22,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2023-11-23 21:30:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:30:22,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:22,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:22,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:22,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:22,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1721059059, now seen corresponding path program 1 times [2023-11-23 21:30:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:22,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404682027] [2023-11-23 21:30:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:22,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:22,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:22,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-23 21:30:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:23,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:30:23,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:23,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:23,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404682027] [2023-11-23 21:30:23,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404682027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:23,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:23,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:30:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319246525] [2023-11-23 21:30:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:23,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:23,117 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:23,179 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2023-11-23 21:30:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 21:30:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:23,181 INFO L225 Difference]: With dead ends: 119 [2023-11-23 21:30:23,181 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 21:30:23,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:23,182 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 33 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:23,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 174 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 21:30:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2023-11-23 21:30:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 73 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2023-11-23 21:30:23,190 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 20 [2023-11-23 21:30:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:23,191 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2023-11-23 21:30:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2023-11-23 21:30:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:30:23,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:23,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:23,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:23,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:23,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:23,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1721118641, now seen corresponding path program 1 times [2023-11-23 21:30:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:23,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341187340] [2023-11-23 21:30:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:23,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:23,398 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:23,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-23 21:30:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:23,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:30:23,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:23,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:30:23,533 INFO L378 Elim1Store]: Elim1 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 16 treesize of output 8 [2023-11-23 21:30:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:23,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:23,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341187340] [2023-11-23 21:30:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341187340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:23,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:23,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829090037] [2023-11-23 21:30:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:23,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:23,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:23,547 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:23,657 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-11-23 21:30:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:30:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 21:30:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:23,659 INFO L225 Difference]: With dead ends: 81 [2023-11-23 21:30:23,659 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 21:30:23,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:23,660 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:23,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 248 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 21:30:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-23 21:30:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 70 states have internal predecessors, (81), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2023-11-23 21:30:23,665 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 20 [2023-11-23 21:30:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:23,666 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2023-11-23 21:30:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2023-11-23 21:30:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:30:23,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:23,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:23,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:23,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:23,870 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:23,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1618556838, now seen corresponding path program 1 times [2023-11-23 21:30:23,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:23,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140057989] [2023-11-23 21:30:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:23,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-23 21:30:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:24,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:30:24,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:24,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:24,225 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:24,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:26,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140057989] [2023-11-23 21:30:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140057989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326895919] [2023-11-23 21:30:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:26,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:26,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:30:26,408 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:30:26,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-23 21:30:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:26,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:30:26,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:26,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:26,795 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:26,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1326895919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179677589] [2023-11-23 21:30:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:26,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:26,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:30:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:26,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:30:26,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:27,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:30:27,227 INFO L378 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:30:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:27,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:27,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179677589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:27,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:27,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 12 [2023-11-23 21:30:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839558627] [2023-11-23 21:30:27,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:27,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:30:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:30:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2023-11-23 21:30:27,298 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:29,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:30:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:29,611 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-11-23 21:30:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:30:29,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-11-23 21:30:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:29,613 INFO L225 Difference]: With dead ends: 80 [2023-11-23 21:30:29,613 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:30:29,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2023-11-23 21:30:29,614 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 100 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:29,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 224 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:30:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:30:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-23 21:30:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 69 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2023-11-23 21:30:29,619 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 21 [2023-11-23 21:30:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:29,619 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2023-11-23 21:30:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2023-11-23 21:30:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:29,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:29,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:29,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:29,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:30,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:30,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:30,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1179993654, now seen corresponding path program 1 times [2023-11-23 21:30:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276786281] [2023-11-23 21:30:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:30,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:30,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:30,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:30,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-23 21:30:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:30,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:30,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:30,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:30,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276786281] [2023-11-23 21:30:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276786281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:30,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:30,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:30:30,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045531199] [2023-11-23 21:30:30,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:30,396 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:30,611 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2023-11-23 21:30:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 21:30:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:30,613 INFO L225 Difference]: With dead ends: 90 [2023-11-23 21:30:30,614 INFO L226 Difference]: Without dead ends: 90 [2023-11-23 21:30:30,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:30:30,614 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 33 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:30,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-23 21:30:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2023-11-23 21:30:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 70 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2023-11-23 21:30:30,619 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 23 [2023-11-23 21:30:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:30,620 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2023-11-23 21:30:30,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2023-11-23 21:30:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:30,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:30,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:30,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:30,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:30,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1179993653, now seen corresponding path program 1 times [2023-11-23 21:30:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254993195] [2023-11-23 21:30:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:30,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:30,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:30,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-23 21:30:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:30,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:30:30,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:31,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:31,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254993195] [2023-11-23 21:30:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254993195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:31,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900035337] [2023-11-23 21:30:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:30:31,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:30:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:31,125 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:31,343 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2023-11-23 21:30:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 21:30:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:31,345 INFO L225 Difference]: With dead ends: 89 [2023-11-23 21:30:31,345 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 21:30:31,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:30:31,346 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:31,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 154 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 21:30:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-11-23 21:30:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 74 states have internal predecessors, (88), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2023-11-23 21:30:31,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 23 [2023-11-23 21:30:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2023-11-23 21:30:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2023-11-23 21:30:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:30:31,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:31,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:31,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:31,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:31,562 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:31,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1364345486, now seen corresponding path program 1 times [2023-11-23 21:30:31,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:31,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003277269] [2023-11-23 21:30:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:31,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:31,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-23 21:30:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:31,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:30:31,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:31,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:30:32,075 INFO L378 Elim1Store]: Elim1 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 31 treesize of output 15 [2023-11-23 21:30:32,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:30:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:32,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:32,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003277269] [2023-11-23 21:30:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003277269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11325237] [2023-11-23 21:30:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:32,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:32,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:30:32,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:30:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-23 21:30:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:32,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:30:32,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:32,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:30:35,041 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:35,086 INFO L378 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-11-23 21:30:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:35,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:35,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11325237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548786780] [2023-11-23 21:30:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:35,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:35,161 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:35,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:30:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:35,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:30:35,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:35,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 21:30:35,653 INFO L378 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:30:35,682 INFO L378 Elim1Store]: Elim1 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 19 treesize of output 7 [2023-11-23 21:30:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:35,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:35,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548786780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:35,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:35,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-23 21:30:35,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038473715] [2023-11-23 21:30:35,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:35,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:30:35,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:30:35,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=352, Unknown=1, NotChecked=0, Total=462 [2023-11-23 21:30:35,748 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 21 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:30:37,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:30:39,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:30:41,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:30:43,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:30:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:45,383 INFO L93 Difference]: Finished difference Result 148 states and 169 transitions. [2023-11-23 21:30:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:30:45,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 22 [2023-11-23 21:30:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:45,386 INFO L225 Difference]: With dead ends: 148 [2023-11-23 21:30:45,386 INFO L226 Difference]: Without dead ends: 148 [2023-11-23 21:30:45,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=179, Invalid=632, Unknown=1, NotChecked=0, Total=812 [2023-11-23 21:30:45,388 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 177 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:45,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 331 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 327 Invalid, 4 Unknown, 0 Unchecked, 9.2s Time] [2023-11-23 21:30:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-23 21:30:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2023-11-23 21:30:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 83 states have internal predecessors, (97), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2023-11-23 21:30:45,395 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 22 [2023-11-23 21:30:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:45,396 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2023-11-23 21:30:45,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:30:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2023-11-23 21:30:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:45,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:45,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:45,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-23 21:30:45,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:45,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:46,009 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:46,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:46,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1179974209, now seen corresponding path program 1 times [2023-11-23 21:30:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578659959] [2023-11-23 21:30:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:46,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:46,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:46,012 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-23 21:30:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:46,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:46,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:46,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:46,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578659959] [2023-11-23 21:30:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578659959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:46,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:30:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173868002] [2023-11-23 21:30:46,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:46,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:46,249 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:46,631 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2023-11-23 21:30:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:30:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 21:30:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:46,633 INFO L225 Difference]: With dead ends: 108 [2023-11-23 21:30:46,634 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 21:30:46,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:30:46,635 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:46,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 143 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:30:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 21:30:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-11-23 21:30:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 86 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2023-11-23 21:30:46,644 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 23 [2023-11-23 21:30:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:46,647 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2023-11-23 21:30:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2023-11-23 21:30:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:46,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:46,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:46,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:46,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:46,853 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:46,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1179974208, now seen corresponding path program 1 times [2023-11-23 21:30:46,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:46,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281754020] [2023-11-23 21:30:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:46,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:46,855 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-23 21:30:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:46,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:30:46,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:47,179 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 21:30:47,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:30:47,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-23 21:30:47,238 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:30:47,239 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:47,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:47,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:47,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281754020] [2023-11-23 21:30:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281754020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:47,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:47,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:30:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069877409] [2023-11-23 21:30:47,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:47,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:30:47,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:30:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2023-11-23 21:30:47,402 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:48,021 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2023-11-23 21:30:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:30:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 21:30:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:48,023 INFO L225 Difference]: With dead ends: 116 [2023-11-23 21:30:48,023 INFO L226 Difference]: Without dead ends: 116 [2023-11-23 21:30:48,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=79, Unknown=1, NotChecked=18, Total=132 [2023-11-23 21:30:48,025 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 83 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:48,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 143 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2023-11-23 21:30:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-23 21:30:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2023-11-23 21:30:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 85 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-11-23 21:30:48,031 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 23 [2023-11-23 21:30:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:48,031 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-11-23 21:30:48,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-11-23 21:30:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:30:48,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:48,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:48,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:48,235 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:48,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2074902453, now seen corresponding path program 1 times [2023-11-23 21:30:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:48,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799360018] [2023-11-23 21:30:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:48,237 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:48,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-23 21:30:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:48,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 21:30:48,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:48,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:48,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:48,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:48,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799360018] [2023-11-23 21:30:48,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799360018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:48,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:48,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:30:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967219298] [2023-11-23 21:30:48,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:48,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:30:48,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:48,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:30:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:30:48,561 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:48,944 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2023-11-23 21:30:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:30:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-23 21:30:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:48,948 INFO L225 Difference]: With dead ends: 101 [2023-11-23 21:30:48,948 INFO L226 Difference]: Without dead ends: 101 [2023-11-23 21:30:48,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:30:48,949 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:48,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 265 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:30:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-23 21:30:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-23 21:30:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.375) internal successors, (99), 85 states have internal predecessors, (99), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2023-11-23 21:30:48,954 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 24 [2023-11-23 21:30:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:48,955 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2023-11-23 21:30:48,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2023-11-23 21:30:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:48,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:48,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:48,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:49,165 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:49,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash 654962984, now seen corresponding path program 1 times [2023-11-23 21:30:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:49,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143213043] [2023-11-23 21:30:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:49,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:49,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:49,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-23 21:30:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:49,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:30:49,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:49,322 INFO L378 Elim1Store]: Elim1 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 7 [2023-11-23 21:30:49,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:30:49,524 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 5 [2023-11-23 21:30:49,602 INFO L378 Elim1Store]: Elim1 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 15 [2023-11-23 21:30:49,665 INFO L378 Elim1Store]: Elim1 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 19 treesize of output 11 [2023-11-23 21:30:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:49,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:51,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143213043] [2023-11-23 21:30:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143213043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538147840] [2023-11-23 21:30:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:51,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:30:51,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:30:51,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-11-23 21:30:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:52,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 21:30:52,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:52,156 INFO L378 Elim1Store]: Elim1 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 7 [2023-11-23 21:30:52,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:30:52,281 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 5 [2023-11-23 21:30:52,343 INFO L378 Elim1Store]: Elim1 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 15 [2023-11-23 21:30:52,408 INFO L378 Elim1Store]: Elim1 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 19 treesize of output 11 [2023-11-23 21:30:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:52,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538147840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288487059] [2023-11-23 21:30:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:52,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:52,529 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:52,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 21:30:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:52,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:30:52,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:52,648 INFO L378 Elim1Store]: Elim1 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 7 [2023-11-23 21:30:52,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 21:30:52,824 INFO L378 Elim1Store]: Elim1 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 13 treesize of output 5 [2023-11-23 21:30:52,878 INFO L378 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-23 21:30:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:30:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:52,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288487059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:53,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 11 [2023-11-23 21:30:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310944498] [2023-11-23 21:30:53,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:30:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:30:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2023-11-23 21:30:53,046 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:53,888 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2023-11-23 21:30:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:30:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2023-11-23 21:30:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:53,891 INFO L225 Difference]: With dead ends: 105 [2023-11-23 21:30:53,891 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 21:30:53,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=40, Invalid=141, Unknown=1, NotChecked=0, Total=182 [2023-11-23 21:30:53,892 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:53,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 301 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:30:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 21:30:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2023-11-23 21:30:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.355263157894737) internal successors, (103), 89 states have internal predecessors, (103), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:30:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2023-11-23 21:30:53,901 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 23 [2023-11-23 21:30:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:53,901 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2023-11-23 21:30:53,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2023-11-23 21:30:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:53,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:53,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:53,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:54,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:54,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:54,524 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:54,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 246138759, now seen corresponding path program 1 times [2023-11-23 21:30:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859403299] [2023-11-23 21:30:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:54,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:54,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:54,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-23 21:30:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:54,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:30:54,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:54,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:30:54,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:30:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:54,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:54,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859403299] [2023-11-23 21:30:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859403299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:54,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:54,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110982543] [2023-11-23 21:30:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:54,803 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:55,025 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2023-11-23 21:30:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:30:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 21:30:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:55,026 INFO L225 Difference]: With dead ends: 85 [2023-11-23 21:30:55,026 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:30:55,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:55,027 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:55,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 253 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:55,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:30:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-23 21:30:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 69 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:30:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2023-11-23 21:30:55,031 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 23 [2023-11-23 21:30:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:55,031 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2023-11-23 21:30:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:30:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2023-11-23 21:30:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:30:55,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:55,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:55,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:55,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:55,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:55,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2075520090, now seen corresponding path program 1 times [2023-11-23 21:30:55,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:55,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004080295] [2023-11-23 21:30:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:55,238 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:55,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-23 21:30:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:55,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:30:55,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:55,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:55,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004080295] [2023-11-23 21:30:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004080295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:55,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:30:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193648196] [2023-11-23 21:30:55,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:55,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:55,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:55,352 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:55,455 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2023-11-23 21:30:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-23 21:30:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:55,457 INFO L225 Difference]: With dead ends: 92 [2023-11-23 21:30:55,457 INFO L226 Difference]: Without dead ends: 92 [2023-11-23 21:30:55,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:55,458 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:55,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 137 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-23 21:30:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2023-11-23 21:30:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.368421052631579) internal successors, (78), 69 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:30:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-11-23 21:30:55,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 24 [2023-11-23 21:30:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:55,463 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-11-23 21:30:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:30:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-11-23 21:30:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:30:55,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:55,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:55,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:55,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:55,667 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:30:55,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2075505225, now seen corresponding path program 1 times [2023-11-23 21:30:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:30:55,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850629454] [2023-11-23 21:30:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:55,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:30:55,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:30:55,669 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:30:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-23 21:30:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:55,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 21:30:55,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:55,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:56,221 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:56,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:58,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:30:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850629454] [2023-11-23 21:30:58,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850629454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:58,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [556823233] [2023-11-23 21:30:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:58,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:30:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:30:58,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:30:58,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-11-23 21:30:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:58,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:30:58,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:58,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:59,182 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:59,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:59,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [556823233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178698567] [2023-11-23 21:30:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:59,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:59,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:59,363 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:59,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-23 21:30:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:59,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:30:59,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:59,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:30:59,748 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:30:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:59,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178698567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:59,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:59,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2023-11-23 21:30:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540169683] [2023-11-23 21:30:59,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:30:59,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:30:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:30:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2023-11-23 21:30:59,915 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:00,657 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-11-23 21:31:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:31:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-23 21:31:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:00,659 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:31:00,659 INFO L226 Difference]: Without dead ends: 79 [2023-11-23 21:31:00,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2023-11-23 21:31:00,660 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:00,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 204 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:00,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-23 21:31:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-23 21:31:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:31:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-11-23 21:31:00,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 24 [2023-11-23 21:31:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-11-23 21:31:00,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-11-23 21:31:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:31:00,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:00,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:00,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:00,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:01,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:01,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:01,270 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:31:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash -102533270, now seen corresponding path program 1 times [2023-11-23 21:31:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916083163] [2023-11-23 21:31:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:01,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:31:01,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-23 21:31:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:01,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:31:01,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:01,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:31:02,308 INFO L378 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-11-23 21:31:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:02,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:02,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916083163] [2023-11-23 21:31:02,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916083163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:02,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:31:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609492541] [2023-11-23 21:31:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:31:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:31:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:31:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:31:02,451 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:04,353 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2023-11-23 21:31:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:31:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 21:31:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:04,355 INFO L225 Difference]: With dead ends: 80 [2023-11-23 21:31:04,355 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:31:04,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:31:04,356 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:04,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 191 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:31:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:31:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-11-23 21:31:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 68 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:31:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-23 21:31:04,361 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 25 [2023-11-23 21:31:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:04,361 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-23 21:31:04,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-23 21:31:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:31:04,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:04,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:04,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:04,566 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-23 21:31:04,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -83847361, now seen corresponding path program 1 times [2023-11-23 21:31:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:31:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431672418] [2023-11-23 21:31:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:04,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:31:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:31:04,568 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:31:04,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-23 21:31:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:04,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:31:04,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:04,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:31:05,189 INFO L378 Elim1Store]: Elim1 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 [2023-11-23 21:31:05,396 INFO L378 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-11-23 21:31:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:05,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:07,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:31:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431672418] [2023-11-23 21:31:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431672418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552191155] [2023-11-23 21:31:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:31:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:31:07,832 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:31:07,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4bf90b-b9d5-48e3-8450-403e04eeffae/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process