./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91 --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 64bit --witnessprinter.graph.data.programhash d8688e7f79ed82546c684653a3176376ee7ee300eb5fd6039eaf31b6bcdf87ca --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:35,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:35,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-25 00:06:35,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:35,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:35,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:35,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:35,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:35,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:35,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:35,964 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:35,965 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:35,966 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:35,966 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:35,967 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:35,968 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:35,968 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:35,969 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:35,969 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:35,970 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:35,971 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:35,971 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:35,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-25 00:06:35,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-25 00:06:35,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:35,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:35,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:35,975 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-25 00:06:35,975 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-25 00:06:35,976 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-25 00:06:35,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:35,977 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:06:35,977 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:06:35,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:35,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:35,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:35,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:35,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:35,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:35,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:35,980 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:35,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:35,980 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:35,981 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:35,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:35,981 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_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8688e7f79ed82546c684653a3176376ee7ee300eb5fd6039eaf31b6bcdf87ca [2023-11-25 00:06:36,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:36,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:36,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:36,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:36,351 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:36,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2023-11-25 00:06:39,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:39,911 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:39,915 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2023-11-25 00:06:39,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/2ab7c09f1/15424334f470491490ebdd446896c7d7/FLAG583dfb48d [2023-11-25 00:06:39,968 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/2ab7c09f1/15424334f470491490ebdd446896c7d7 [2023-11-25 00:06:39,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:39,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:39,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:39,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:39,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:39,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:39" (1/1) ... [2023-11-25 00:06:39,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da4b225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:39, skipping insertion in model container [2023-11-25 00:06:39,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:39" (1/1) ... [2023-11-25 00:06:40,047 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:40,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:40,967 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) [2023-11-25 00:06:40,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cbe6e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:40, skipping insertion in model container [2023-11-25 00:06:40,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:40,969 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-25 00:06:40,971 INFO L158 Benchmark]: Toolchain (without parser) took 997.88ms. Allocated memory is still 163.6MB. Free memory was 121.3MB in the beginning and 102.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-25 00:06:40,971 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 117.4MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:06:40,972 INFO L158 Benchmark]: CACSL2BoogieTranslator took 995.12ms. Allocated memory is still 163.6MB. Free memory was 121.3MB in the beginning and 102.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-25 00:06:40,974 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 117.4MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 995.12ms. Allocated memory is still 163.6MB. Free memory was 121.3MB in the beginning and 102.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1162]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91 --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 64bit --witnessprinter.graph.data.programhash d8688e7f79ed82546c684653a3176376ee7ee300eb5fd6039eaf31b6bcdf87ca --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:43,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:43,537 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-11-25 00:06:43,543 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:43,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:43,570 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:43,571 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:43,571 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:43,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:43,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:43,573 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:43,573 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:43,574 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:43,574 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:43,575 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:43,575 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:43,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-25 00:06:43,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-25 00:06:43,577 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:43,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:43,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:43,583 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-25 00:06:43,584 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-25 00:06:43,584 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-25 00:06:43,589 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:43,589 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:06:43,590 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-25 00:06:43,591 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-25 00:06:43,592 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:06:43,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:43,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:43,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-25 00:06:43,594 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:43,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:43,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:43,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:43,596 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:43,596 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-25 00:06:43,596 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-25 00:06:43,597 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:43,597 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:43,597 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:43,597 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_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8688e7f79ed82546c684653a3176376ee7ee300eb5fd6039eaf31b6bcdf87ca [2023-11-25 00:06:43,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:43,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:43,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:43,994 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:43,995 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:43,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2023-11-25 00:06:47,275 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:47,602 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:47,602 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2023-11-25 00:06:47,622 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/d5cf57f2e/fdfa7e8dc8134a5cbcc1105dddeed338/FLAG79e1dc0e0 [2023-11-25 00:06:47,643 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/data/d5cf57f2e/fdfa7e8dc8134a5cbcc1105dddeed338 [2023-11-25 00:06:47,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:47,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:47,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:47,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:47,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:47,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:47" (1/1) ... [2023-11-25 00:06:47,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279bf007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:47, skipping insertion in model container [2023-11-25 00:06:47,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:47" (1/1) ... [2023-11-25 00:06:47,769 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:48,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:48,663 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-25 00:06:48,684 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:48,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:48,766 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:48,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:48,981 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:48,982 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:48,990 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:48,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48 WrapperNode [2023-11-25 00:06:48,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:48,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:48,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:48,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:49,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,110 INFO L138 Inliner]: procedures = 355, calls = 118, calls flagged for inlining = 9, calls inlined = 7, statements flattened = 268 [2023-11-25 00:06:49,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:49,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:49,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:49,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:49,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,178 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,201 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:49,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:49,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:49,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:49,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (1/1) ... [2023-11-25 00:06:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:49,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:49,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:49,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-11-25 00:06:49,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:06:49,293 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:06:49,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:06:49,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-11-25 00:06:49,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:06:49,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-25 00:06:49,294 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-25 00:06:49,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:06:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-25 00:06:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:06:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:49,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:49,473 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:49,475 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:50,628 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:50,762 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:50,762 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-25 00:06:50,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:50 BoogieIcfgContainer [2023-11-25 00:06:50,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:50,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:50,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:50,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:50,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:47" (1/3) ... [2023-11-25 00:06:50,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e139b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:50, skipping insertion in model container [2023-11-25 00:06:50,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:48" (2/3) ... [2023-11-25 00:06:50,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e139b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:50, skipping insertion in model container [2023-11-25 00:06:50,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:50" (3/3) ... [2023-11-25 00:06:50,775 INFO L112 eAbstractionObserver]: Analyzing ICFG dirname-1.i [2023-11-25 00:06:50,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:50,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 73 error locations. [2023-11-25 00:06:50,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:50,857 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;@4c950951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:50,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-11-25 00:06:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 151 states have internal predecessors, (175), 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) [2023-11-25 00:06:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-25 00:06:50,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:50,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-25 00:06:50,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:06:50,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash 11350, now seen corresponding path program 1 times [2023-11-25 00:06:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:06:50,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780473498] [2023-11-25 00:06:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:50,906 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 [2023-11-25 00:06:50,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:06:50,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:06:50,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:51,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:06:51,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:51,160 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 [2023-11-25 00:06:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:51,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:51,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:06:51,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780473498] [2023-11-25 00:06:51,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780473498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:51,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:51,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:06:51,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486753945] [2023-11-25 00:06:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:06:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:51,220 INFO L87 Difference]: Start difference. First operand has 154 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 151 states have internal predecessors, (175), 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:51,871 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2023-11-25 00:06:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-25 00:06:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:51,887 INFO L225 Difference]: With dead ends: 165 [2023-11-25 00:06:51,887 INFO L226 Difference]: Without dead ends: 164 [2023-11-25 00:06:51,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:51,895 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 139 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:51,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 115 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:06:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-25 00:06:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2023-11-25 00:06:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 144 states have internal predecessors, (160), 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) [2023-11-25 00:06:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2023-11-25 00:06:51,979 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 2 [2023-11-25 00:06:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:51,979 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2023-11-25 00:06:51,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2023-11-25 00:06:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-25 00:06:51,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:51,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-25 00:06:51,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:52,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:06:52,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 11351, now seen corresponding path program 1 times [2023-11-25 00:06:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:06:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181775311] [2023-11-25 00:06:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:52,189 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 [2023-11-25 00:06:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:06:52,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:06:52,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:52,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:06:52,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:52,328 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 [2023-11-25 00:06:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:52,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:52,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:06:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181775311] [2023-11-25 00:06:52,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181775311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:52,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:06:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582292978] [2023-11-25 00:06:52,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:06:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:52,348 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:53,248 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2023-11-25 00:06:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-25 00:06:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:53,250 INFO L225 Difference]: With dead ends: 146 [2023-11-25 00:06:53,250 INFO L226 Difference]: Without dead ends: 146 [2023-11-25 00:06:53,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:53,252 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:53,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 224 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:06:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-25 00:06:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-11-25 00:06:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 143 states have internal predecessors, (159), 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) [2023-11-25 00:06:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2023-11-25 00:06:53,264 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 2 [2023-11-25 00:06:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:53,264 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2023-11-25 00:06:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2023-11-25 00:06:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:06:53,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:53,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:06:53,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:53,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:53,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:06:53,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash 11211477, now seen corresponding path program 1 times [2023-11-25 00:06:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:06:53,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265976594] [2023-11-25 00:06:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:53,483 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 [2023-11-25 00:06:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:06:53,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:06:53,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:53,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:06:53,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:53,624 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 [2023-11-25 00:06:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:53,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:53,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:06:53,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265976594] [2023-11-25 00:06:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265976594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:53,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:53,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:06:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585822509] [2023-11-25 00:06:53,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:53,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:06:53,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:53,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:53,713 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:54,601 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2023-11-25 00:06:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:06:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:06:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:54,603 INFO L225 Difference]: With dead ends: 148 [2023-11-25 00:06:54,604 INFO L226 Difference]: Without dead ends: 148 [2023-11-25 00:06:54,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:54,605 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:54,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 223 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:06:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-25 00:06:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-11-25 00:06:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 145 states have internal predecessors, (161), 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) [2023-11-25 00:06:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2023-11-25 00:06:54,617 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 4 [2023-11-25 00:06:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:54,617 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2023-11-25 00:06:54,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2023-11-25 00:06:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:06:54,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:54,619 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-25 00:06:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:54,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:54,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:06:54,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2110374130, now seen corresponding path program 1 times [2023-11-25 00:06:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:06:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432267785] [2023-11-25 00:06:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:54,827 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 [2023-11-25 00:06:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:06:54,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:06:54,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:06:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:54,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:06:54,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:54,952 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 [2023-11-25 00:06:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:55,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:55,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:06:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432267785] [2023-11-25 00:06:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432267785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171997053] [2023-11-25 00:06:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:55,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-25 00:06:55,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-25 00:06:55,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-25 00:06:55,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-25 00:06:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:56,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:06:56,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:56,072 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 [2023-11-25 00:06:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:56,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171997053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683118176] [2023-11-25 00:06:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:56,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:56,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:56,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:56,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:06:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:56,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:06:56,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:56,556 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 [2023-11-25 00:06:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:56,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683118176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:56,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-25 00:06:56,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2023-11-25 00:06:56,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721762556] [2023-11-25 00:06:56,847 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:06:56,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:06:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:06:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:06:56,849 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:07:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:00,711 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2023-11-25 00:07:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:07:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-25 00:07:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:00,714 INFO L225 Difference]: With dead ends: 150 [2023-11-25 00:07:00,714 INFO L226 Difference]: Without dead ends: 150 [2023-11-25 00:07:00,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:07:00,715 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 13 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 483 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-25 00:07:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-25 00:07:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-25 00:07:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 147 states have internal predecessors, (163), 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) [2023-11-25 00:07:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2023-11-25 00:07:00,727 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 6 [2023-11-25 00:07:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:00,728 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2023-11-25 00:07:00,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:07:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2023-11-25 00:07:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-25 00:07:00,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:00,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:00,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:00,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:01,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:01,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:01,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:01,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash 69347256, now seen corresponding path program 1 times [2023-11-25 00:07:01,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:01,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104299129] [2023-11-25 00:07:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:01,335 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 [2023-11-25 00:07:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:01,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:01,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:01,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:07:01,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:01,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:01,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104299129] [2023-11-25 00:07:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104299129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991408659] [2023-11-25 00:07:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:01,655 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-25 00:07:01,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-25 00:07:01,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-25 00:07:01,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-25 00:07:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:01,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:07:01,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:02,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991408659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153661850] [2023-11-25 00:07:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:02,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:02,151 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:02,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:07:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:02,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:07:02,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:02,317 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 [2023-11-25 00:07:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:02,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153661850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:03,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-25 00:07:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 18 [2023-11-25 00:07:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4632321] [2023-11-25 00:07:03,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:07:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:07:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:07:03,210 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:07:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:06,415 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2023-11-25 00:07:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:07:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-25 00:07:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:06,417 INFO L225 Difference]: With dead ends: 160 [2023-11-25 00:07:06,417 INFO L226 Difference]: Without dead ends: 160 [2023-11-25 00:07:06,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:07:06,418 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 20 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:06,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 889 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-25 00:07:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-25 00:07:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-25 00:07:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 91 states have (on average 1.901098901098901) internal successors, (173), 157 states have internal predecessors, (173), 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) [2023-11-25 00:07:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 175 transitions. [2023-11-25 00:07:06,428 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 175 transitions. Word has length 17 [2023-11-25 00:07:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 175 transitions. [2023-11-25 00:07:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:07:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 175 transitions. [2023-11-25 00:07:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:07:06,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:06,430 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:06,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:06,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:06,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:07,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:07,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1896134715, now seen corresponding path program 2 times [2023-11-25 00:07:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:07,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832951502] [2023-11-25 00:07:07,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-25 00:07:07,036 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 [2023-11-25 00:07:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:07,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:07,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:07,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-25 00:07:07,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:07:07,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:07:07,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:07,247 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-25 00:07:07,248 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-25 00:07:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-25 00:07:07,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:07,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832951502] [2023-11-25 00:07:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832951502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:07:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694512424] [2023-11-25 00:07:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:07,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:07,285 INFO L87 Difference]: Start difference. First operand 160 states and 175 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-25 00:07:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:07,987 INFO L93 Difference]: Finished difference Result 172 states and 188 transitions. [2023-11-25 00:07:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 27 [2023-11-25 00:07:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:07,989 INFO L225 Difference]: With dead ends: 172 [2023-11-25 00:07:07,989 INFO L226 Difference]: Without dead ends: 172 [2023-11-25 00:07:07,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:07,990 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 127 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:07,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 116 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:07:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-25 00:07:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2023-11-25 00:07:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 91 states have (on average 1.8461538461538463) internal successors, (168), 152 states have internal predecessors, (168), 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) [2023-11-25 00:07:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2023-11-25 00:07:07,998 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 27 [2023-11-25 00:07:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:07,998 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2023-11-25 00:07:07,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-25 00:07:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2023-11-25 00:07:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:07:07,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:07,999 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:08,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:08,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1896134716, now seen corresponding path program 1 times [2023-11-25 00:07:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:08,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200097735] [2023-11-25 00:07:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:08,208 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 [2023-11-25 00:07:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:08,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:08,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 (12)] Waiting until timeout for monitored process [2023-11-25 00:07:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:08,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:07:08,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:08,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:08,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200097735] [2023-11-25 00:07:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200097735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [150514197] [2023-11-25 00:07:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:08,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-25 00:07:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-25 00:07:08,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-25 00:07:08,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-11-25 00:07:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:09,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:07:09,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:09,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [150514197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634979146] [2023-11-25 00:07:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:09,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:09,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:09,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-25 00:07:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:09,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-25 00:07:09,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:09,669 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 [2023-11-25 00:07:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:10,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634979146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:16,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-25 00:07:16,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 12] total 38 [2023-11-25 00:07:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437193008] [2023-11-25 00:07:16,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-25 00:07:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-25 00:07:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2023-11-25 00:07:16,261 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:07:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:28,850 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2023-11-25 00:07:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-25 00:07:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-25 00:07:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:28,853 INFO L225 Difference]: With dead ends: 175 [2023-11-25 00:07:28,854 INFO L226 Difference]: Without dead ends: 175 [2023-11-25 00:07:28,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=601, Invalid=1849, Unknown=0, NotChecked=0, Total=2450 [2023-11-25 00:07:28,856 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 41 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:28,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1634 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-11-25 00:07:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-25 00:07:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-25 00:07:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 111 states have (on average 1.7027027027027026) internal successors, (189), 172 states have internal predecessors, (189), 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) [2023-11-25 00:07:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 191 transitions. [2023-11-25 00:07:28,864 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 191 transitions. Word has length 27 [2023-11-25 00:07:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:28,864 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 191 transitions. [2023-11-25 00:07:28,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:07:28,865 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 191 transitions. [2023-11-25 00:07:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-25 00:07:28,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:28,866 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:28,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:29,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:29,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 (12)] Ended with exit code 0 [2023-11-25 00:07:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:29,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:29,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1216524746, now seen corresponding path program 2 times [2023-11-25 00:07:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:29,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061643629] [2023-11-25 00:07:29,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-25 00:07:29,477 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 [2023-11-25 00:07:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:29,479 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:29,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-25 00:07:29,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:07:29,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:07:29,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:29,731 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-25 00:07:29,731 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 1 case distinctions, treesize of input 19 treesize of output 21 [2023-11-25 00:07:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-25 00:07:29,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:29,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061643629] [2023-11-25 00:07:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061643629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:07:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436066995] [2023-11-25 00:07:29,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:07:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:07:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:07:29,833 INFO L87 Difference]: Start difference. First operand 175 states and 191 transitions. Second operand has 6 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) [2023-11-25 00:07:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:31,707 INFO L93 Difference]: Finished difference Result 281 states and 310 transitions. [2023-11-25 00:07:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:07:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 31 [2023-11-25 00:07:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:31,710 INFO L225 Difference]: With dead ends: 281 [2023-11-25 00:07:31,710 INFO L226 Difference]: Without dead ends: 281 [2023-11-25 00:07:31,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:07:31,711 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 264 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:31,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 352 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-25 00:07:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-25 00:07:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 225. [2023-11-25 00:07:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 162 states have (on average 1.8333333333333333) internal successors, (297), 222 states have internal predecessors, (297), 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) [2023-11-25 00:07:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 299 transitions. [2023-11-25 00:07:31,720 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 299 transitions. Word has length 31 [2023-11-25 00:07:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:31,721 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 299 transitions. [2023-11-25 00:07:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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) [2023-11-25 00:07:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 299 transitions. [2023-11-25 00:07:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-25 00:07:31,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:31,723 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:31,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:31,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash 849473601, now seen corresponding path program 1 times [2023-11-25 00:07:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701880864] [2023-11-25 00:07:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:31,927 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 [2023-11-25 00:07:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:31,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:32,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:07:32,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:07:32,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-25 00:07:32,500 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 10 treesize of output 8 [2023-11-25 00:07:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:07:32,704 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 19 treesize of output 14 [2023-11-25 00:07:32,724 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-25 00:07:32,724 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 [2023-11-25 00:07:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-25 00:07:32,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:32,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:32,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701880864] [2023-11-25 00:07:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701880864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:32,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:32,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:07:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143085644] [2023-11-25 00:07:32,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:07:32,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:07:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:07:32,814 INFO L87 Difference]: Start difference. First operand 225 states and 299 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-11-25 00:07:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:35,576 INFO L93 Difference]: Finished difference Result 297 states and 327 transitions. [2023-11-25 00:07:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:07:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 33 [2023-11-25 00:07:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:35,579 INFO L225 Difference]: With dead ends: 297 [2023-11-25 00:07:35,579 INFO L226 Difference]: Without dead ends: 297 [2023-11-25 00:07:35,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:07:35,580 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 432 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 410 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-25 00:07:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-25 00:07:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 235. [2023-11-25 00:07:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 172 states have (on average 1.8255813953488371) internal successors, (314), 232 states have internal predecessors, (314), 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) [2023-11-25 00:07:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 316 transitions. [2023-11-25 00:07:35,589 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 316 transitions. Word has length 33 [2023-11-25 00:07:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 316 transitions. [2023-11-25 00:07:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-11-25 00:07:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 316 transitions. [2023-11-25 00:07:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-25 00:07:35,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:35,592 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:35,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:35,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:07:35,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-25 00:07:35,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash 300609016, now seen corresponding path program 1 times [2023-11-25 00:07:35,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:07:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536233962] [2023-11-25 00:07:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:35,801 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 [2023-11-25 00:07:35,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:07:35,802 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:07:35,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_685c8b83-f31d-4794-881b-dae82a02f4b1/bin/utaipan-verify-SwPr7d2a91/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 (17)] Waiting until timeout for monitored process [2023-11-25 00:07:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:36,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:07:36,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:36,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-25 00:07:36,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-25 00:07:36,439 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 11 treesize of output 10 [2023-11-25 00:07:36,464 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 [2023-11-25 00:07:36,687 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-25 00:07:36,687 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 19 treesize of output 18 [2023-11-25 00:07:36,737 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-25 00:07:36,737 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 [2023-11-25 00:07:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-25 00:07:36,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:07:36,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:07:36,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536233962] [2023-11-25 00:07:36,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536233962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:36,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:36,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:07:36,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762384086] [2023-11-25 00:07:36,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:36,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:07:36,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:07:36,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:07:36,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:07:36,958 INFO L87 Difference]: Start difference. First operand 235 states and 316 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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)