./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:51:06,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:51:06,445 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 05:51:06,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:51:06,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:51:06,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:51:06,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:51:06,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:51:06,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:51:06,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:51:06,513 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:51:06,513 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:51:06,513 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:51:06,513 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:51:06,515 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:51:06,515 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:51:06,516 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:51:06,516 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:51:06,516 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:51:06,516 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:51:06,516 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:51:06,516 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:51:06,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:51:06,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:51:06,517 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:51:06,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:51:06,518 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:51:06,518 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:51:06,518 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:51:06,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:51:06,519 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:51:06,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:51:06,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:51:06,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:51:06,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:51:06,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:51:06,520 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:51:06,521 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2024-11-14 05:51:06,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:51:06,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:51:06,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:51:06,937 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:51:06,937 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:51:06,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i Unable to find full path for "g++" [2024-11-14 05:51:09,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:51:09,605 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:51:09,606 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-14 05:51:09,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/89dffeb67/1a2c29fc0b1d43a785477007e1a5085c/FLAG9a3c32dd2 [2024-11-14 05:51:09,659 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/89dffeb67/1a2c29fc0b1d43a785477007e1a5085c [2024-11-14 05:51:09,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:51:09,666 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:51:09,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:51:09,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:51:09,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:51:09,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:51:09" (1/1) ... [2024-11-14 05:51:09,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711d9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:09, skipping insertion in model container [2024-11-14 05:51:09,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:51:09" (1/1) ... [2024-11-14 05:51:09,750 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:51:10,175 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:10,241 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:10,253 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:10,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:51:10,279 ERROR L321 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) [2024-11-14 05:51:10,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f5834dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:10, skipping insertion in model container [2024-11-14 05:51:10,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:51:10,280 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-14 05:51:10,282 INFO L158 Benchmark]: Toolchain (without parser) took 615.62ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 76.7MB in the end (delta: 14.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:51:10,283 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 74.0MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:51:10,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 611.38ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 76.7MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:51:10,285 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 74.0MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 611.38ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 76.7MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:51:13,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:51:13,531 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2024-11-14 05:51:13,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:51:13,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:51:13,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:51:13,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:51:13,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:51:13,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:51:13,594 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:51:13,595 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:51:13,595 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:51:13,596 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:51:13,596 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:51:13,597 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:51:13,597 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:51:13,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:51:13,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:51:13,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:51:13,599 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:51:13,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 05:51:13,600 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:51:13,601 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:51:13,601 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:51:13,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:51:13,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 05:51:13,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:51:13,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:51:13,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:51:13,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:51:13,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:51:13,603 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 05:51:13,603 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:13,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:51:13,603 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:51:13,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2024-11-14 05:51:14,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:51:14,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:51:14,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:51:14,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:51:14,024 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:51:14,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i Unable to find full path for "g++" [2024-11-14 05:51:16,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:51:16,825 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:51:16,826 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-14 05:51:16,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/58e5baf0e/b55b1f5b958a4cabb8068385641b1ec9/FLAGbda3d6f18 [2024-11-14 05:51:16,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/data/58e5baf0e/b55b1f5b958a4cabb8068385641b1ec9 [2024-11-14 05:51:16,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:51:16,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:51:16,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:51:16,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:51:16,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:51:16,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:51:16" (1/1) ... [2024-11-14 05:51:16,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2021db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:16, skipping insertion in model container [2024-11-14 05:51:16,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:51:16" (1/1) ... [2024-11-14 05:51:16,949 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:51:17,445 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,511 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,519 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:51:17,546 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-14 05:51:17,559 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:51:17,604 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,637 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,644 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:51:17,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:51:17,657 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:51:17,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:51:17,806 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:51:17,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17 WrapperNode [2024-11-14 05:51:17,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:51:17,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:51:17,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:51:17,808 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:51:17,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,879 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 95 [2024-11-14 05:51:17,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:51:17,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:51:17,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:51:17,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:51:17,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,912 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:51:17,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:51:17,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:51:17,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:51:17,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (1/1) ... [2024-11-14 05:51:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:51:17,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:17,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:51:17,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:51:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-14 05:51:18,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 05:51:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:51:18,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:51:18,200 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:51:18,202 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:51:18,584 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-14 05:51:18,584 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:51:18,601 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:51:18,602 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:51:18,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:51:18 BoogieIcfgContainer [2024-11-14 05:51:18,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:51:18,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:51:18,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:51:18,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:51:18,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:51:16" (1/3) ... [2024-11-14 05:51:18,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268906bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:51:18, skipping insertion in model container [2024-11-14 05:51:18,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:51:17" (2/3) ... [2024-11-14 05:51:18,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268906bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:51:18, skipping insertion in model container [2024-11-14 05:51:18,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:51:18" (3/3) ... [2024-11-14 05:51:18,618 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2024-11-14 05:51:18,637 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:51:18,638 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test17_2-2.i that has 2 procedures, 66 locations, 1 initial locations, 4 loop locations, and 20 error locations. [2024-11-14 05:51:18,701 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:51:18,714 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@50d00cd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:51:18,715 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-14 05:51:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:51:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:18,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:18,729 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:18,729 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:18,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1301613917, now seen corresponding path program 1 times [2024-11-14 05:51:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941379104] [2024-11-14 05:51:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:18,754 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 [2024-11-14 05:51:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:18,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:18,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-14 05:51:18,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:18,949 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:18,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941379104] [2024-11-14 05:51:18,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941379104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:18,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:51:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423562491] [2024-11-14 05:51:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:18,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:51:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:51:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:51:18,997 INFO L87 Difference]: Start difference. First operand has 66 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:19,022 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-14 05:51:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:51:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:19,033 INFO L225 Difference]: With dead ends: 66 [2024-11-14 05:51:19,033 INFO L226 Difference]: Without dead ends: 64 [2024-11-14 05:51:19,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:51:19,042 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:19,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:51:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-14 05:51:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-14 05:51:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:51:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-11-14 05:51:19,105 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 14 [2024-11-14 05:51:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:19,106 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-11-14 05:51:19,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-11-14 05:51:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:19,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:19,109 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:19,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:19,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:19,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:19,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash 908586907, now seen corresponding path program 1 times [2024-11-14 05:51:19,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:19,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064812159] [2024-11-14 05:51:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:19,315 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 [2024-11-14 05:51:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:19,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:19,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:19,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:51:19,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:19,513 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 [2024-11-14 05:51:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:19,622 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:19,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064812159] [2024-11-14 05:51:19,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064812159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:19,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:19,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:51:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510907306] [2024-11-14 05:51:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:19,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:51:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:51:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:19,627 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:19,945 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2024-11-14 05:51:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:51:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:19,949 INFO L225 Difference]: With dead ends: 90 [2024-11-14 05:51:19,950 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 05:51:19,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:19,951 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:19,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 178 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:51:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 05:51:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2024-11-14 05:51:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2024-11-14 05:51:19,963 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 14 [2024-11-14 05:51:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:19,964 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2024-11-14 05:51:19,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2024-11-14 05:51:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:19,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:19,965 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:19,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Ended with exit code 0 [2024-11-14 05:51:20,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:20,166 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:20,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash 908586908, now seen corresponding path program 1 times [2024-11-14 05:51:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232976008] [2024-11-14 05:51:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:20,171 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 [2024-11-14 05:51:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:20,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:20,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:20,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:51:20,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:20,376 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 [2024-11-14 05:51:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:20,871 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:20,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:20,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232976008] [2024-11-14 05:51:20,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232976008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:20,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:20,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 05:51:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743518154] [2024-11-14 05:51:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:20,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:51:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:51:20,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:51:20,877 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:21,482 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2024-11-14 05:51:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:51:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:21,484 INFO L225 Difference]: With dead ends: 91 [2024-11-14 05:51:21,488 INFO L226 Difference]: Without dead ends: 91 [2024-11-14 05:51:21,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:51:21,489 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 56 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:21,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 378 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:51:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-14 05:51:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2024-11-14 05:51:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 76 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-11-14 05:51:21,506 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 14 [2024-11-14 05:51:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:21,507 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-11-14 05:51:21,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-11-14 05:51:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:21,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:21,508 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:21,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:21,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:21,709 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:21,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash 908683036, now seen corresponding path program 1 times [2024-11-14 05:51:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459725225] [2024-11-14 05:51:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:21,710 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 [2024-11-14 05:51:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:21,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:21,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:21,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:51:21,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:21,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:21,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:21,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459725225] [2024-11-14 05:51:21,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459725225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:21,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:21,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:51:21,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768644533] [2024-11-14 05:51:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:21,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:51:21,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:51:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:21,840 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:21,990 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2024-11-14 05:51:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:51:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:21,992 INFO L225 Difference]: With dead ends: 134 [2024-11-14 05:51:21,992 INFO L226 Difference]: Without dead ends: 134 [2024-11-14 05:51:21,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:21,996 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 49 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:21,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 319 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:51:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-14 05:51:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2024-11-14 05:51:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.5789473684210527) internal successors, (90), 76 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2024-11-14 05:51:22,013 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 14 [2024-11-14 05:51:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:22,015 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2024-11-14 05:51:22,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2024-11-14 05:51:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:22,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:22,017 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:22,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Ended with exit code 0 [2024-11-14 05:51:22,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:22,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:22,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1796090588, now seen corresponding path program 1 times [2024-11-14 05:51:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591073671] [2024-11-14 05:51:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:22,220 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 [2024-11-14 05:51:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:22,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:22,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 05:51:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:22,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:51:22,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:22,384 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:22,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:22,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591073671] [2024-11-14 05:51:22,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591073671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:22,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:22,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:51:22,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042459344] [2024-11-14 05:51:22,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:22,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:51:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:51:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:22,389 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:22,462 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-11-14 05:51:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:51:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:22,465 INFO L225 Difference]: With dead ends: 77 [2024-11-14 05:51:22,465 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 05:51:22,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:22,466 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:22,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 271 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:51:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 05:51:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-14 05:51:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 72 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2024-11-14 05:51:22,473 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 14 [2024-11-14 05:51:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:22,474 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2024-11-14 05:51:22,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2024-11-14 05:51:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:51:22,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:22,475 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:22,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 05:51:22,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:22,676 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:22,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1796186717, now seen corresponding path program 1 times [2024-11-14 05:51:22,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:22,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691357358] [2024-11-14 05:51:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:22,677 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 [2024-11-14 05:51:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:22,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:22,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-14 05:51:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:22,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:51:22,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:22,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:22,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691357358] [2024-11-14 05:51:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691357358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:22,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:51:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897487596] [2024-11-14 05:51:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:22,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:51:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:51:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:51:22,819 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:22,958 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2024-11-14 05:51:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:51:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:51:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:22,960 INFO L225 Difference]: With dead ends: 79 [2024-11-14 05:51:22,960 INFO L226 Difference]: Without dead ends: 75 [2024-11-14 05:51:22,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:51:22,961 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:22,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 168 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:51:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-14 05:51:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-14 05:51:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 71 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-11-14 05:51:22,976 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 14 [2024-11-14 05:51:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:22,976 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-11-14 05:51:22,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:51:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-11-14 05:51:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:51:22,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:22,977 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:22,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-14 05:51:23,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:23,178 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:23,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 828654863, now seen corresponding path program 1 times [2024-11-14 05:51:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585727429] [2024-11-14 05:51:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:23,179 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 [2024-11-14 05:51:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:23,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:23,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:23,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:51:23,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:23,348 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 [2024-11-14 05:51:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:23,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:25,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:25,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585727429] [2024-11-14 05:51:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585727429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993752154] [2024-11-14 05:51:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:25,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:51:25,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:51:25,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-14 05:51:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:25,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:51:25,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:25,682 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 [2024-11-14 05:51:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:25,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [993752154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065503163] [2024-11-14 05:51:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:26,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:26,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:26,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:26,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:51:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:26,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:51:26,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:26,434 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 [2024-11-14 05:51:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:26,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065503163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:27,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:51:27,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 11, 9] total 20 [2024-11-14 05:51:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028211173] [2024-11-14 05:51:27,139 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:27,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:51:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:51:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:51:27,141 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:51:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:29,513 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2024-11-14 05:51:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:51:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-14 05:51:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:29,518 INFO L225 Difference]: With dead ends: 92 [2024-11-14 05:51:29,518 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 05:51:29,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:51:29,520 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 155 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:29,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 591 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:51:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 05:51:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2024-11-14 05:51:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 80 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2024-11-14 05:51:29,528 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 17 [2024-11-14 05:51:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:29,529 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2024-11-14 05:51:29,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:51:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2024-11-14 05:51:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:51:29,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:29,530 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:29,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:29,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Ended with exit code 0 [2024-11-14 05:51:29,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:30,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:30,132 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:30,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2036944167, now seen corresponding path program 1 times [2024-11-14 05:51:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:30,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448769590] [2024-11-14 05:51:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:30,133 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 [2024-11-14 05:51:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:30,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:30,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:30,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:51:30,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:30,226 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 [2024-11-14 05:51:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:30,315 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:30,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448769590] [2024-11-14 05:51:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448769590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:51:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678032709] [2024-11-14 05:51:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:30,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:51:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:51:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:51:30,317 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-14 05:51:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:30,590 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2024-11-14 05:51:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:51:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2024-11-14 05:51:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:30,592 INFO L225 Difference]: With dead ends: 94 [2024-11-14 05:51:30,592 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 05:51:30,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:51:30,593 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:30,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 207 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:51:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 05:51:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-11-14 05:51:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.532258064516129) internal successors, (95), 81 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2024-11-14 05:51:30,606 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 22 [2024-11-14 05:51:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:30,606 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2024-11-14 05:51:30,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-14 05:51:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2024-11-14 05:51:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:51:30,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:30,607 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:30,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Ended with exit code 0 [2024-11-14 05:51:30,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:30,813 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:30,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2036944166, now seen corresponding path program 1 times [2024-11-14 05:51:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716518949] [2024-11-14 05:51:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:30,814 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 [2024-11-14 05:51:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:30,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:30,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:30,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:51:30,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:31,006 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 [2024-11-14 05:51:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:31,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:32,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716518949] [2024-11-14 05:51:32,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716518949] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:32,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:51:32,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-11-14 05:51:32,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780067627] [2024-11-14 05:51:32,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:32,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:51:32,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:51:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:51:32,540 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-14 05:51:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:33,857 INFO L93 Difference]: Finished difference Result 136 states and 161 transitions. [2024-11-14 05:51:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:51:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2024-11-14 05:51:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:33,859 INFO L225 Difference]: With dead ends: 136 [2024-11-14 05:51:33,859 INFO L226 Difference]: Without dead ends: 136 [2024-11-14 05:51:33,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:51:33,860 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 76 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:33,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 291 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:51:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-14 05:51:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2024-11-14 05:51:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 81 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2024-11-14 05:51:33,868 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 22 [2024-11-14 05:51:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:33,868 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2024-11-14 05:51:33,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-14 05:51:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2024-11-14 05:51:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:51:33,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:33,869 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:33,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:34,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:34,070 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:34,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1279238798, now seen corresponding path program 1 times [2024-11-14 05:51:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:34,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872756190] [2024-11-14 05:51:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:34,071 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 [2024-11-14 05:51:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:34,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:34,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-14 05:51:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:34,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:51:34,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:34,223 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:51:34,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:34,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872756190] [2024-11-14 05:51:34,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872756190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:51:34,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:51:34,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:51:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617204986] [2024-11-14 05:51:34,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:51:34,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:51:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:51:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:34,226 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-14 05:51:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:34,287 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-14 05:51:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:51:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 23 [2024-11-14 05:51:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:34,289 INFO L225 Difference]: With dead ends: 84 [2024-11-14 05:51:34,289 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 05:51:34,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:51:34,291 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 35 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:34,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 197 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:51:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 05:51:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-14 05:51:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 80 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-14 05:51:34,297 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 23 [2024-11-14 05:51:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:34,297 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-14 05:51:34,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-14 05:51:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-14 05:51:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:51:34,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:34,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:34,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-11-14 05:51:34,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:34,499 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:34,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1279240338, now seen corresponding path program 1 times [2024-11-14 05:51:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17685804] [2024-11-14 05:51:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:34,501 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 [2024-11-14 05:51:34,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:34,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-11-14 05:51:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:34,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:51:34,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:34,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:51:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:34,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:34,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:51:34,780 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 18 treesize of output 16 [2024-11-14 05:51:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:34,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:34,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17685804] [2024-11-14 05:51:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17685804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:34,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1637623049] [2024-11-14 05:51:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:34,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:51:34,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:51:34,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-14 05:51:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:35,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:51:35,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:35,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1637623049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960216961] [2024-11-14 05:51:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:35,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:35,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:51:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:35,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:51:35,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:35,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:51:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:35,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:35,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:51:35,997 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 18 treesize of output 16 [2024-11-14 05:51:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960216961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:36,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:51:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 7, 8, 5] total 25 [2024-11-14 05:51:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487222580] [2024-11-14 05:51:36,017 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:36,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:51:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:51:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:51:36,019 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:37,569 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2024-11-14 05:51:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:51:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-14 05:51:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:37,573 INFO L225 Difference]: With dead ends: 170 [2024-11-14 05:51:37,573 INFO L226 Difference]: Without dead ends: 170 [2024-11-14 05:51:37,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:51:37,575 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 369 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:37,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 789 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:51:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-14 05:51:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 92. [2024-11-14 05:51:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.565217391304348) internal successors, (108), 87 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:51:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2024-11-14 05:51:37,582 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 23 [2024-11-14 05:51:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:37,583 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2024-11-14 05:51:37,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:51:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2024-11-14 05:51:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:51:37,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:37,584 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:37,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:51:37,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-11-14 05:51:37,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-14 05:51:38,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:38,185 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:38,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:38,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1638390827, now seen corresponding path program 1 times [2024-11-14 05:51:38,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:38,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521943645] [2024-11-14 05:51:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:38,186 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 [2024-11-14 05:51:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:38,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:38,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:38,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:51:38,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:38,327 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 [2024-11-14 05:51:38,425 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)))) is different from true [2024-11-14 05:51:38,459 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:51:38,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-14 05:51:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:51:38,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:38,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521943645] [2024-11-14 05:51:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521943645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [844974403] [2024-11-14 05:51:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:38,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:38,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:51:38,695 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:51:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-14 05:51:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:38,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:51:38,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:38,925 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 [2024-11-14 05:51:39,071 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 05:51:39,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:51:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:39,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [844974403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:43,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262159496] [2024-11-14 05:51:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:43,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:43,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:43,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:51:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:43,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:51:43,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:43,467 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 [2024-11-14 05:51:43,584 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 05:51:43,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:51:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:43,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:43,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262159496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:43,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:51:43,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 7, 7, 6] total 10 [2024-11-14 05:51:43,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264880320] [2024-11-14 05:51:43,895 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:43,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:51:43,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:51:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=67, Unknown=3, NotChecked=16, Total=110 [2024-11-14 05:51:43,897 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:44,643 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2024-11-14 05:51:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:51:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-11-14 05:51:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:44,645 INFO L225 Difference]: With dead ends: 125 [2024-11-14 05:51:44,646 INFO L226 Difference]: Without dead ends: 125 [2024-11-14 05:51:44,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=34, Invalid=99, Unknown=3, NotChecked=20, Total=156 [2024-11-14 05:51:44,646 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 62 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:44,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 311 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 95 Unchecked, 0.7s Time] [2024-11-14 05:51:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-14 05:51:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2024-11-14 05:51:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 97 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:51:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2024-11-14 05:51:44,657 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 26 [2024-11-14 05:51:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:44,658 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2024-11-14 05:51:44,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:51:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2024-11-14 05:51:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:51:44,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:44,662 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:44,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-14 05:51:44,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:51:45,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:45,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:45,263 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:45,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1638390828, now seen corresponding path program 1 times [2024-11-14 05:51:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:45,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751820114] [2024-11-14 05:51:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:45,264 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 [2024-11-14 05:51:45,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:45,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-11-14 05:51:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:45,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:51:45,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:45,435 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 [2024-11-14 05:51:46,103 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2024-11-14 05:51:46,150 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 05:51:46,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2024-11-14 05:51:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:51:46,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:46,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751820114] [2024-11-14 05:51:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751820114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898170462] [2024-11-14 05:51:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:51:46,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:51:46,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-14 05:51:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:46,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 05:51:46,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:47,029 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 [2024-11-14 05:51:47,041 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 [2024-11-14 05:51:47,957 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-14 05:51:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:48,011 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 16 treesize of output 11 [2024-11-14 05:51:48,029 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:51:48,029 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 [2024-11-14 05:51:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:51:48,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1898170462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044432814] [2024-11-14 05:51:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:50,495 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:50,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:51:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:50,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 05:51:50,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:50,634 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 [2024-11-14 05:51:50,643 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 [2024-11-14 05:51:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:51:51,067 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 16 treesize of output 11 [2024-11-14 05:51:51,106 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:51:51,106 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 [2024-11-14 05:51:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:51:51,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:51,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044432814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:51,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:51:51,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2024-11-14 05:51:51,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840110953] [2024-11-14 05:51:51,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:51,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:51:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:51:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:51:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=563, Unknown=3, NotChecked=98, Total=756 [2024-11-14 05:51:51,550 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:51:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:55,269 INFO L93 Difference]: Finished difference Result 272 states and 355 transitions. [2024-11-14 05:51:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:51:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-11-14 05:51:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:55,272 INFO L225 Difference]: With dead ends: 272 [2024-11-14 05:51:55,272 INFO L226 Difference]: Without dead ends: 272 [2024-11-14 05:51:55,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=157, Invalid=903, Unknown=4, NotChecked=126, Total=1190 [2024-11-14 05:51:55,273 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 251 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:55,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1422 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1117 Invalid, 0 Unknown, 450 Unchecked, 3.0s Time] [2024-11-14 05:51:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-14 05:51:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 108. [2024-11-14 05:51:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 102 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:51:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2024-11-14 05:51:55,283 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 26 [2024-11-14 05:51:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:55,283 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2024-11-14 05:51:55,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:51:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2024-11-14 05:51:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:51:55,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:55,285 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:55,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2024-11-14 05:51:55,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 05:51:55,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-11-14 05:51:55,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:51:55,886 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:51:55,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1633262116, now seen corresponding path program 2 times [2024-11-14 05:51:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:51:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498852826] [2024-11-14 05:51:55,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:51:55,887 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 [2024-11-14 05:51:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:51:55,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:51:55,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (23)] Waiting until timeout for monitored process [2024-11-14 05:51:55,990 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:51:55,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:51:55,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:51:55,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:56,072 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 [2024-11-14 05:51:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:56,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:51:59,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:51:59,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498852826] [2024-11-14 05:51:59,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498852826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:59,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37855310] [2024-11-14 05:51:59,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:51:59,662 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:51:59,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:51:59,664 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:51:59,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-14 05:51:59,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:51:59,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:51:59,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:51:59,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:59,952 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 [2024-11-14 05:52:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:00,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37855310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:01,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274070004] [2024-11-14 05:52:01,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:52:01,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:01,435 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:01,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:52:01,539 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:52:01,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:01,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:52:01,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:01,568 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 [2024-11-14 05:52:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:01,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:05,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274070004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:05,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:52:05,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15, 13, 15, 13] total 34 [2024-11-14 05:52:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165998394] [2024-11-14 05:52:05,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:05,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 05:52:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 05:52:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:52:05,324 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:52:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:14,997 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2024-11-14 05:52:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:52:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-14 05:52:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:14,999 INFO L225 Difference]: With dead ends: 129 [2024-11-14 05:52:14,999 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 05:52:15,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:52:15,001 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 203 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:15,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 904 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 05:52:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 05:52:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2024-11-14 05:52:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 120 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:52:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2024-11-14 05:52:15,007 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 26 [2024-11-14 05:52:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:15,008 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2024-11-14 05:52:15,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:52:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2024-11-14 05:52:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:52:15,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:15,009 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:15,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (23)] Ended with exit code 0 [2024-11-14 05:52:15,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:15,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-14 05:52:15,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:15,610 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:15,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1759462376, now seen corresponding path program 1 times [2024-11-14 05:52:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:15,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843774627] [2024-11-14 05:52:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:15,611 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 [2024-11-14 05:52:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:15,616 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:15,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2024-11-14 05:52:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:15,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:52:15,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:15,720 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:52:15,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843774627] [2024-11-14 05:52:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843774627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:52:15,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:52:15,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:52:15,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260571386] [2024-11-14 05:52:15,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:52:15,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:52:15,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:15,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:52:15,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:52:15,721 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:52:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:15,777 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2024-11-14 05:52:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:52:15,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-14 05:52:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:15,779 INFO L225 Difference]: With dead ends: 135 [2024-11-14 05:52:15,779 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 05:52:15,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:52:15,780 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:15,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:52:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 05:52:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2024-11-14 05:52:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 122 states have internal predecessors, (156), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:52:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2024-11-14 05:52:15,790 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 28 [2024-11-14 05:52:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:15,791 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2024-11-14 05:52:15,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:52:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2024-11-14 05:52:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:52:15,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:15,793 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:15,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:15,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:52:15,994 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:15,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash -16652041, now seen corresponding path program 1 times [2024-11-14 05:52:15,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:15,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515964799] [2024-11-14 05:52:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:15,995 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 [2024-11-14 05:52:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:15,997 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:15,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2024-11-14 05:52:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:16,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:52:16,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:52:16,103 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:52:16,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515964799] [2024-11-14 05:52:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515964799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:52:16,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:52:16,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:52:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764788306] [2024-11-14 05:52:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:52:16,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:52:16,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:52:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:52:16,105 INFO L87 Difference]: Start difference. First operand 130 states and 167 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:16,185 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2024-11-14 05:52:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:52:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-14 05:52:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:16,186 INFO L225 Difference]: With dead ends: 124 [2024-11-14 05:52:16,186 INFO L226 Difference]: Without dead ends: 124 [2024-11-14 05:52:16,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:52:16,187 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:16,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:52:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-14 05:52:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2024-11-14 05:52:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 112 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:52:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2024-11-14 05:52:16,193 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 28 [2024-11-14 05:52:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:16,194 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2024-11-14 05:52:16,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2024-11-14 05:52:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 05:52:16,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:16,195 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:16,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2024-11-14 05:52:16,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:52:16,396 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:16,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash 149462303, now seen corresponding path program 2 times [2024-11-14 05:52:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:16,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794787562] [2024-11-14 05:52:16,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:52:16,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:52:16,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:16,400 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2024-11-14 05:52:16,519 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:52:16,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:16,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:52:16,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:16,575 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 [2024-11-14 05:52:16,582 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 [2024-11-14 05:52:17,539 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-14 05:52:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:17,577 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 21 treesize of output 14 [2024-11-14 05:52:17,593 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:17,593 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 [2024-11-14 05:52:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:52:17,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:18,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794787562] [2024-11-14 05:52:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794787562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1088215501] [2024-11-14 05:52:18,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:52:18,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:18,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:18,204 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:18,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-14 05:52:18,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:52:18,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:18,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:52:18,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:18,426 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 [2024-11-14 05:52:18,433 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 [2024-11-14 05:52:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:18,899 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 21 treesize of output 14 [2024-11-14 05:52:18,936 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:18,936 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 [2024-11-14 05:52:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:52:19,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1088215501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529358939] [2024-11-14 05:52:21,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:52:21,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:21,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:21,382 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:21,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:52:21,501 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:52:21,501 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:21,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:52:21,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:21,530 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 [2024-11-14 05:52:21,541 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 [2024-11-14 05:52:22,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:22,037 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 21 treesize of output 14 [2024-11-14 05:52:22,054 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:22,054 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 [2024-11-14 05:52:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 05:52:22,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529358939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:22,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2024-11-14 05:52:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605696634] [2024-11-14 05:52:22,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:22,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:52:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:52:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2024-11-14 05:52:22,558 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:24,807 INFO L93 Difference]: Finished difference Result 191 states and 236 transitions. [2024-11-14 05:52:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:52:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-14 05:52:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:24,809 INFO L225 Difference]: With dead ends: 191 [2024-11-14 05:52:24,809 INFO L226 Difference]: Without dead ends: 191 [2024-11-14 05:52:24,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=100, Invalid=503, Unknown=1, NotChecked=46, Total=650 [2024-11-14 05:52:24,810 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 120 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:24,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 792 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 734 Invalid, 0 Unknown, 156 Unchecked, 1.8s Time] [2024-11-14 05:52:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-14 05:52:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 120. [2024-11-14 05:52:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 112 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:52:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2024-11-14 05:52:24,818 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 29 [2024-11-14 05:52:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:24,818 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2024-11-14 05:52:24,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2024-11-14 05:52:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:52:24,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:24,819 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:24,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:25,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:25,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2024-11-14 05:52:25,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:52:25,421 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:25,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2133916537, now seen corresponding path program 1 times [2024-11-14 05:52:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73734945] [2024-11-14 05:52:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:25,423 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 [2024-11-14 05:52:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:25,425 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:25,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2024-11-14 05:52:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:25,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:52:25,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:25,528 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 [2024-11-14 05:52:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:25,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:25,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73734945] [2024-11-14 05:52:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73734945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [369858276] [2024-11-14 05:52:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:25,804 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:25,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-14 05:52:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:26,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:52:26,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:26,008 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 [2024-11-14 05:52:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:26,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:26,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [369858276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:26,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283671314] [2024-11-14 05:52:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:26,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:26,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:26,205 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:52:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:26,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:52:26,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:26,323 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 [2024-11-14 05:52:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:26,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283671314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:26,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:52:26,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2024-11-14 05:52:26,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252028830] [2024-11-14 05:52:26,511 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:26,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:52:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:52:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:52:26,512 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:52:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:26,868 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2024-11-14 05:52:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:52:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-14 05:52:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:26,869 INFO L225 Difference]: With dead ends: 136 [2024-11-14 05:52:26,869 INFO L226 Difference]: Without dead ends: 136 [2024-11-14 05:52:26,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:52:26,870 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:26,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 225 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:52:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-14 05:52:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2024-11-14 05:52:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.393939393939394) internal successors, (138), 113 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:52:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2024-11-14 05:52:26,876 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 31 [2024-11-14 05:52:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:26,878 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2024-11-14 05:52:26,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:52:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2024-11-14 05:52:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:52:26,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:26,881 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:26,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2024-11-14 05:52:27,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2024-11-14 05:52:27,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 05:52:27,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:27,482 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:27,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2133916538, now seen corresponding path program 1 times [2024-11-14 05:52:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330803058] [2024-11-14 05:52:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:27,483 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 [2024-11-14 05:52:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:27,485 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:27,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (34)] Waiting until timeout for monitored process [2024-11-14 05:52:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:27,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:52:27,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:27,661 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 [2024-11-14 05:52:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:28,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:29,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:29,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330803058] [2024-11-14 05:52:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330803058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:29,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550760576] [2024-11-14 05:52:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:29,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:29,430 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:29,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-14 05:52:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:29,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:52:29,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:29,655 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 [2024-11-14 05:52:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:30,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550760576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110518931] [2024-11-14 05:52:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:32,570 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:32,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 05:52:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:32,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:52:32,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:32,723 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 [2024-11-14 05:52:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:33,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110518931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:34,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:52:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 13, 11, 10, 10] total 37 [2024-11-14 05:52:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147121203] [2024-11-14 05:52:34,440 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:34,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 05:52:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 05:52:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:52:34,442 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 38 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:52:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:39,986 INFO L93 Difference]: Finished difference Result 282 states and 342 transitions. [2024-11-14 05:52:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 05:52:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 31 [2024-11-14 05:52:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:39,989 INFO L225 Difference]: With dead ends: 282 [2024-11-14 05:52:39,989 INFO L226 Difference]: Without dead ends: 282 [2024-11-14 05:52:39,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=323, Invalid=2127, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:52:39,990 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 479 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:39,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1335 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 05:52:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-14 05:52:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 146. [2024-11-14 05:52:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.4227642276422765) internal successors, (175), 137 states have internal predecessors, (175), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-14 05:52:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2024-11-14 05:52:39,999 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 31 [2024-11-14 05:52:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:40,000 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2024-11-14 05:52:40,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:52:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2024-11-14 05:52:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:52:40,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:40,001 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:40,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (34)] Ended with exit code 0 [2024-11-14 05:52:40,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-14 05:52:40,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:40,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:40,602 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:40,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1005819005, now seen corresponding path program 1 times [2024-11-14 05:52:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820248256] [2024-11-14 05:52:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:40,603 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 [2024-11-14 05:52:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:40,606 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:40,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (37)] Waiting until timeout for monitored process [2024-11-14 05:52:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:40,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:52:40,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:40,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:41,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:41,178 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 25 treesize of output 29 [2024-11-14 05:52:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:41,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820248256] [2024-11-14 05:52:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820248256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:41,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843403213] [2024-11-14 05:52:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:41,584 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:41,588 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:41,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-14 05:52:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:41,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:52:41,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:41,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:42,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:42,057 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 25 treesize of output 29 [2024-11-14 05:52:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843403213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200362483] [2024-11-14 05:52:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:42,240 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 05:52:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:42,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:52:42,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:42,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:42,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:42,621 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 25 treesize of output 29 [2024-11-14 05:52:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200362483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:42,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:52:42,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2024-11-14 05:52:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69245731] [2024-11-14 05:52:42,821 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:42,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:52:42,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:52:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:52:42,822 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:52:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:43,725 INFO L93 Difference]: Finished difference Result 200 states and 264 transitions. [2024-11-14 05:52:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:52:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-14 05:52:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:43,728 INFO L225 Difference]: With dead ends: 200 [2024-11-14 05:52:43,728 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 05:52:43,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:52:43,729 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 130 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:43,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 307 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:52:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 05:52:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2024-11-14 05:52:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 138 states have (on average 1.4275362318840579) internal successors, (197), 151 states have internal predecessors, (197), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:52:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 217 transitions. [2024-11-14 05:52:43,741 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 217 transitions. Word has length 32 [2024-11-14 05:52:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:43,741 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 217 transitions. [2024-11-14 05:52:43,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:52:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 217 transitions. [2024-11-14 05:52:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:52:43,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:43,743 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:43,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-14 05:52:43,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 05:52:44,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (37)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:44,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:52:44,347 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:44,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1902007116, now seen corresponding path program 3 times [2024-11-14 05:52:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:44,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838375935] [2024-11-14 05:52:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:52:44,348 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 [2024-11-14 05:52:44,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:44,350 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:44,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (40)] Waiting until timeout for monitored process [2024-11-14 05:52:44,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:52:44,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:44,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:52:44,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:44,522 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 [2024-11-14 05:52:44,534 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 [2024-11-14 05:52:45,133 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-14 05:52:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:45,179 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 16 treesize of output 11 [2024-11-14 05:52:45,214 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:45,214 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 [2024-11-14 05:52:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2024-11-14 05:52:45,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:45,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:45,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838375935] [2024-11-14 05:52:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838375935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:45,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95061878] [2024-11-14 05:52:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:52:45,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:45,904 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:45,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2024-11-14 05:52:46,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:52:46,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:46,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:52:46,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:46,157 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 [2024-11-14 05:52:46,168 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 [2024-11-14 05:52:46,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:46,589 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 16 treesize of output 11 [2024-11-14 05:52:46,616 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:46,616 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 [2024-11-14 05:52:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2024-11-14 05:52:46,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:50,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95061878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:50,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250042682] [2024-11-14 05:52:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:52:50,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:50,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:51,000 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:51,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 05:52:51,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:52:51,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:51,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:52:51,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:51,167 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 [2024-11-14 05:52:51,176 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 [2024-11-14 05:52:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:52:51,630 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 16 treesize of output 11 [2024-11-14 05:52:51,646 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:52:51,646 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 [2024-11-14 05:52:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2024-11-14 05:52:51,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250042682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:52,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:52,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2024-11-14 05:52:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130243980] [2024-11-14 05:52:52,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:52,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:52:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:52:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2024-11-14 05:52:52,057 INFO L87 Difference]: Start difference. First operand 163 states and 217 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:53,707 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2024-11-14 05:52:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:52:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-11-14 05:52:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:53,709 INFO L225 Difference]: With dead ends: 184 [2024-11-14 05:52:53,709 INFO L226 Difference]: Without dead ends: 184 [2024-11-14 05:52:53,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=76, Invalid=347, Unknown=1, NotChecked=38, Total=462 [2024-11-14 05:52:53,710 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 87 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:53,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 528 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 117 Unchecked, 1.1s Time] [2024-11-14 05:52:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-14 05:52:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2024-11-14 05:52:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 130 states have (on average 1.4307692307692308) internal successors, (186), 144 states have internal predecessors, (186), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:52:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2024-11-14 05:52:53,718 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 32 [2024-11-14 05:52:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:53,718 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2024-11-14 05:52:53,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:52:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2024-11-14 05:52:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:52:53,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:53,720 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:53,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2024-11-14 05:52:53,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (40)] Ended with exit code 0 [2024-11-14 05:52:54,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 05:52:54,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:54,321 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:54,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1115618127, now seen corresponding path program 1 times [2024-11-14 05:52:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:54,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467111111] [2024-11-14 05:52:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:54,322 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 [2024-11-14 05:52:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:54,324 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:54,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (43)] Waiting until timeout for monitored process [2024-11-14 05:52:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:54,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:52:54,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:54,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:52:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:54,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:54,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:52:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:55,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467111111] [2024-11-14 05:52:55,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467111111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695083008] [2024-11-14 05:52:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:55,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:55,037 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:55,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2024-11-14 05:52:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:55,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:52:55,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:55,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:52:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:52:55,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:55,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:52:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695083008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224360647] [2024-11-14 05:52:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:55,918 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:55,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 05:52:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:56,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:52:56,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:56,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:52:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:52:56,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:56,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:52:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:56,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224360647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:56,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:52:56,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 8, 10, 8] total 19 [2024-11-14 05:52:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047403604] [2024-11-14 05:52:56,408 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:56,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:52:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:52:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:52:56,410 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:52:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:57,729 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2024-11-14 05:52:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:52:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2024-11-14 05:52:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:57,733 INFO L225 Difference]: With dead ends: 218 [2024-11-14 05:52:57,733 INFO L226 Difference]: Without dead ends: 218 [2024-11-14 05:52:57,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-11-14 05:52:57,736 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 88 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:57,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 696 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:52:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-14 05:52:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 187. [2024-11-14 05:52:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.49079754601227) internal successors, (243), 176 states have internal predecessors, (243), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:52:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 260 transitions. [2024-11-14 05:52:57,744 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 260 transitions. Word has length 33 [2024-11-14 05:52:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:57,744 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 260 transitions. [2024-11-14 05:52:57,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:52:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 260 transitions. [2024-11-14 05:52:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:52:57,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:57,745 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:57,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2024-11-14 05:52:57,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 05:52:58,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (43)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:58,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:52:58,347 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:52:58,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1994346599, now seen corresponding path program 1 times [2024-11-14 05:52:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:52:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585081348] [2024-11-14 05:52:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:58,347 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 [2024-11-14 05:52:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:52:58,354 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:52:58,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (46)] Waiting until timeout for monitored process [2024-11-14 05:52:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:58,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:52:58,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:58,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:59,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:52:59,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585081348] [2024-11-14 05:52:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585081348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:59,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409880017] [2024-11-14 05:52:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:59,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:52:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:52:59,118 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:52:59,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-14 05:52:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:59,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:52:59,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:59,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:52:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409880017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228808868] [2024-11-14 05:52:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:59,556 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:59,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 05:52:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:59,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:52:59,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:52:59,971 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:52:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228808868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:52:59,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2024-11-14 05:52:59,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 5, 4] total 14 [2024-11-14 05:52:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962372693] [2024-11-14 05:52:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:52:59,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:52:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:52:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:52:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:52:59,977 INFO L87 Difference]: Start difference. First operand 187 states and 260 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:53:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:00,061 INFO L93 Difference]: Finished difference Result 192 states and 258 transitions. [2024-11-14 05:53:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:53:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-14 05:53:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:00,063 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:53:00,063 INFO L226 Difference]: Without dead ends: 192 [2024-11-14 05:53:00,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:53:00,064 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:00,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 198 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:53:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-14 05:53:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2024-11-14 05:53:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.45) internal successors, (232), 173 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:53:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 249 transitions. [2024-11-14 05:53:00,072 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 249 transitions. Word has length 33 [2024-11-14 05:53:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:00,072 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 249 transitions. [2024-11-14 05:53:00,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:53:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 249 transitions. [2024-11-14 05:53:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:53:00,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:00,073 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:00,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (46)] Ended with exit code 0 [2024-11-14 05:53:00,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:00,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2024-11-14 05:53:00,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:00,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:00,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1994394329, now seen corresponding path program 1 times [2024-11-14 05:53:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317839864] [2024-11-14 05:53:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:00,679 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 [2024-11-14 05:53:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:00,681 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:00,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (49)] Waiting until timeout for monitored process [2024-11-14 05:53:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:00,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:53:00,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:00,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:53:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:01,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:01,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:53:01,431 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 22 treesize of output 20 [2024-11-14 05:53:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:01,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317839864] [2024-11-14 05:53:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317839864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255026558] [2024-11-14 05:53:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:01,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:01,535 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:01,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-14 05:53:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:01,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:53:01,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:02,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:53:02,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:53:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:02,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:02,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:53:02,892 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 22 treesize of output 20 [2024-11-14 05:53:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:53:02,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1255026558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389697753] [2024-11-14 05:53:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:02,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:02,973 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:02,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 05:53:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:03,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:53:03,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:03,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:53:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:03,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:03,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:53:03,912 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 22 treesize of output 20 [2024-11-14 05:53:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:03,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389697753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:03,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:03,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 6, 9, 6] total 26 [2024-11-14 05:53:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662825081] [2024-11-14 05:53:03,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:03,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:53:03,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:53:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:53:03,969 INFO L87 Difference]: Start difference. First operand 184 states and 249 transitions. Second operand has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 05:53:06,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:08,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:10,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:13,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:15,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:17,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:20,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:20,128 INFO L93 Difference]: Finished difference Result 262 states and 344 transitions. [2024-11-14 05:53:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:53:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2024-11-14 05:53:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:20,131 INFO L225 Difference]: With dead ends: 262 [2024-11-14 05:53:20,131 INFO L226 Difference]: Without dead ends: 262 [2024-11-14 05:53:20,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 05:53:20,132 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 186 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 9 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:20,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 657 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 474 Invalid, 7 Unknown, 0 Unchecked, 15.5s Time] [2024-11-14 05:53:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-14 05:53:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 197. [2024-11-14 05:53:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.4269005847953216) internal successors, (244), 185 states have internal predecessors, (244), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:53:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2024-11-14 05:53:20,145 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 33 [2024-11-14 05:53:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:20,145 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2024-11-14 05:53:20,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 05:53:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2024-11-14 05:53:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 05:53:20,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:20,146 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:20,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:20,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (49)] Ended with exit code 0 [2024-11-14 05:53:20,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:20,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:20,747 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:20,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash 224423708, now seen corresponding path program 1 times [2024-11-14 05:53:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:20,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675389223] [2024-11-14 05:53:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:20,748 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 [2024-11-14 05:53:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:20,751 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:20,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (52)] Waiting until timeout for monitored process [2024-11-14 05:53:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:20,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:53:20,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:21,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:21,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:53:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:53:21,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:22,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:53:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:22,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675389223] [2024-11-14 05:53:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675389223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698719273] [2024-11-14 05:53:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:22,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:22,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:22,593 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:22,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-14 05:53:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:22,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:53:22,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:23,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:23,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:53:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:23,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:23,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:53:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:23,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698719273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:23,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920138585] [2024-11-14 05:53:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:23,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:23,924 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 05:53:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:24,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:53:24,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:24,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:24,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:53:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:24,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:24,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 05:53:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:24,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920138585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:24,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:24,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11, 8, 11, 8] total 26 [2024-11-14 05:53:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067052185] [2024-11-14 05:53:24,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:24,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:53:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:53:24,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2024-11-14 05:53:24,639 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:53:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:28,197 INFO L93 Difference]: Finished difference Result 224 states and 283 transitions. [2024-11-14 05:53:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:53:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2024-11-14 05:53:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:28,204 INFO L225 Difference]: With dead ends: 224 [2024-11-14 05:53:28,204 INFO L226 Difference]: Without dead ends: 222 [2024-11-14 05:53:28,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:53:28,206 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 229 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:28,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 628 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 05:53:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-14 05:53:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 200. [2024-11-14 05:53:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 174 states have (on average 1.4195402298850575) internal successors, (247), 187 states have internal predecessors, (247), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:53:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 264 transitions. [2024-11-14 05:53:28,229 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 264 transitions. Word has length 34 [2024-11-14 05:53:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:28,229 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 264 transitions. [2024-11-14 05:53:28,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:53:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 264 transitions. [2024-11-14 05:53:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:53:28,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:28,230 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:28,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2024-11-14 05:53:28,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (52)] Ended with exit code 0 [2024-11-14 05:53:28,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 05:53:28,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:28,835 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:28,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1632799503, now seen corresponding path program 1 times [2024-11-14 05:53:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:28,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234468602] [2024-11-14 05:53:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:28,837 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 [2024-11-14 05:53:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:28,839 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (55)] Waiting until timeout for monitored process [2024-11-14 05:53:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:29,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:53:29,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:29,045 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 [2024-11-14 05:53:29,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:29,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:53:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:29,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:29,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-14 05:53:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:29,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234468602] [2024-11-14 05:53:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234468602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [111608942] [2024-11-14 05:53:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:29,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:29,865 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:29,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2024-11-14 05:53:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:30,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:53:30,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:30,395 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 [2024-11-14 05:53:30,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:30,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:53:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:30,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:30,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-14 05:53:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [111608942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922301594] [2024-11-14 05:53:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:31,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:31,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:31,083 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:31,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 05:53:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:31,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:53:31,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:31,310 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 [2024-11-14 05:53:31,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:53:31,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:53:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:31,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:31,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-14 05:53:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:31,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922301594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:31,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 20 [2024-11-14 05:53:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183657117] [2024-11-14 05:53:31,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:31,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:53:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:53:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:53:31,781 INFO L87 Difference]: Start difference. First operand 200 states and 264 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:53:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:33,166 INFO L93 Difference]: Finished difference Result 207 states and 271 transitions. [2024-11-14 05:53:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:53:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2024-11-14 05:53:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:33,169 INFO L225 Difference]: With dead ends: 207 [2024-11-14 05:53:33,169 INFO L226 Difference]: Without dead ends: 207 [2024-11-14 05:53:33,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:53:33,170 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 62 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:33,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 546 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:53:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-14 05:53:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2024-11-14 05:53:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 175 states have (on average 1.417142857142857) internal successors, (248), 188 states have internal predecessors, (248), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 05:53:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 265 transitions. [2024-11-14 05:53:33,178 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 265 transitions. Word has length 35 [2024-11-14 05:53:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:33,179 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 265 transitions. [2024-11-14 05:53:33,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:53:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 265 transitions. [2024-11-14 05:53:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:53:33,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:33,180 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:33,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (55)] Ended with exit code 0 [2024-11-14 05:53:33,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-14 05:53:33,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2024-11-14 05:53:33,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:33,781 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:33,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1956983887, now seen corresponding path program 1 times [2024-11-14 05:53:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568000421] [2024-11-14 05:53:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:33,782 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 [2024-11-14 05:53:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:33,784 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:33,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (58)] Waiting until timeout for monitored process [2024-11-14 05:53:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:33,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:53:33,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:34,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:53:34,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568000421] [2024-11-14 05:53:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568000421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886261935] [2024-11-14 05:53:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:34,580 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:34,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2024-11-14 05:53:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:34,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:53:34,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:35,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:53:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886261935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781893797] [2024-11-14 05:53:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:35,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:35,130 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:35,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-14 05:53:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:35,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:53:35,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:35,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:53:35,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781893797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:35,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:35,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 7] total 16 [2024-11-14 05:53:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694420931] [2024-11-14 05:53:35,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:35,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:53:35,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:53:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-14 05:53:35,530 INFO L87 Difference]: Start difference. First operand 201 states and 265 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 05:53:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:36,003 INFO L93 Difference]: Finished difference Result 221 states and 288 transitions. [2024-11-14 05:53:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:53:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-11-14 05:53:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:36,007 INFO L225 Difference]: With dead ends: 221 [2024-11-14 05:53:36,007 INFO L226 Difference]: Without dead ends: 221 [2024-11-14 05:53:36,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:53:36,008 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:36,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:53:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-14 05:53:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2024-11-14 05:53:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 187 states have (on average 1.3957219251336899) internal successors, (261), 199 states have internal predecessors, (261), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:53:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2024-11-14 05:53:36,018 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 36 [2024-11-14 05:53:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:36,018 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2024-11-14 05:53:36,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 05:53:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2024-11-14 05:53:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:53:36,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:36,019 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:36,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:36,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (58)] Ended with exit code 0 [2024-11-14 05:53:36,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-14 05:53:36,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:36,621 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:36,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -125247694, now seen corresponding path program 1 times [2024-11-14 05:53:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890662534] [2024-11-14 05:53:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:36,622 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 [2024-11-14 05:53:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:36,624 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:36,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (61)] Waiting until timeout for monitored process [2024-11-14 05:53:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:36,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:53:36,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:53:36,846 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:53:36,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890662534] [2024-11-14 05:53:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890662534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:53:36,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:53:36,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:53:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137716422] [2024-11-14 05:53:36,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:53:36,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:53:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:53:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:53:36,848 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:53:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:36,893 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2024-11-14 05:53:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:53:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-11-14 05:53:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:36,896 INFO L225 Difference]: With dead ends: 167 [2024-11-14 05:53:36,896 INFO L226 Difference]: Without dead ends: 167 [2024-11-14 05:53:36,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:53:36,897 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:36,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 260 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:53:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-14 05:53:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-11-14 05:53:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 140 states have (on average 1.3357142857142856) internal successors, (187), 153 states have internal predecessors, (187), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-14 05:53:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2024-11-14 05:53:36,907 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 35 [2024-11-14 05:53:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:36,907 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2024-11-14 05:53:36,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:53:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2024-11-14 05:53:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:53:36,908 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:36,908 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:36,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (61)] Ended with exit code 0 [2024-11-14 05:53:37,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:53:37,109 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:37,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1575977897, now seen corresponding path program 1 times [2024-11-14 05:53:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404875682] [2024-11-14 05:53:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:37,111 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 [2024-11-14 05:53:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:37,113 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (62)] Waiting until timeout for monitored process [2024-11-14 05:53:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:37,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:53:37,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:37,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:37,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404875682] [2024-11-14 05:53:37,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404875682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [115510553] [2024-11-14 05:53:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:37,962 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:37,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2024-11-14 05:53:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:38,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:53:38,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:38,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [115510553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276479498] [2024-11-14 05:53:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:38,568 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:38,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-14 05:53:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:38,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:53:38,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:38,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:53:39,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:53:39,601 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 16 treesize of output 13 [2024-11-14 05:53:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:39,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:40,024 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 46 treesize of output 42 [2024-11-14 05:53:40,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 05:53:40,250 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 24 treesize of output 22 [2024-11-14 05:53:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:53:40,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276479498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:40,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:40,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 9] total 33 [2024-11-14 05:53:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657031540] [2024-11-14 05:53:40,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:40,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:53:40,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:53:40,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:53:40,560 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:53:44,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:47,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:53:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:47,658 INFO L93 Difference]: Finished difference Result 219 states and 257 transitions. [2024-11-14 05:53:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:53:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2024-11-14 05:53:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:47,660 INFO L225 Difference]: With dead ends: 219 [2024-11-14 05:53:47,660 INFO L226 Difference]: Without dead ends: 219 [2024-11-14 05:53:47,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=373, Invalid=2707, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:53:47,661 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 283 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:47,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 902 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 634 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2024-11-14 05:53:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-14 05:53:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 185. [2024-11-14 05:53:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 160 states have (on average 1.3) internal successors, (208), 172 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-14 05:53:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 222 transitions. [2024-11-14 05:53:47,670 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 222 transitions. Word has length 36 [2024-11-14 05:53:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:47,670 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 222 transitions. [2024-11-14 05:53:47,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:53:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 222 transitions. [2024-11-14 05:53:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 05:53:47,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:47,672 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:47,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-14 05:53:47,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2024-11-14 05:53:48,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (62)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:48,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:53:48,273 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:48,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1608651205, now seen corresponding path program 1 times [2024-11-14 05:53:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:48,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036073741] [2024-11-14 05:53:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:48,274 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 [2024-11-14 05:53:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:48,277 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:48,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (65)] Waiting until timeout for monitored process [2024-11-14 05:53:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:48,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:53:48,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:53:48,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:49,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036073741] [2024-11-14 05:53:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036073741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248172035] [2024-11-14 05:53:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:49,060 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:49,062 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:49,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2024-11-14 05:53:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:49,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:53:49,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:53:49,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1248172035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207353820] [2024-11-14 05:53:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:49,574 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:49,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-14 05:53:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:49,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:53:49,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:53:49,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207353820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:49,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:53:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2024-11-14 05:53:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4317535] [2024-11-14 05:53:49,986 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:49,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:53:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:53:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:53:49,987 INFO L87 Difference]: Start difference. First operand 185 states and 222 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:53:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:50,242 INFO L93 Difference]: Finished difference Result 184 states and 221 transitions. [2024-11-14 05:53:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:53:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2024-11-14 05:53:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:50,244 INFO L225 Difference]: With dead ends: 184 [2024-11-14 05:53:50,244 INFO L226 Difference]: Without dead ends: 184 [2024-11-14 05:53:50,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:53:50,245 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 36 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:50,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:53:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-14 05:53:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-11-14 05:53:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.29375) internal successors, (207), 171 states have internal predecessors, (207), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-14 05:53:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 221 transitions. [2024-11-14 05:53:50,253 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 221 transitions. Word has length 38 [2024-11-14 05:53:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:50,253 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 221 transitions. [2024-11-14 05:53:50,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:53:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 221 transitions. [2024-11-14 05:53:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:53:50,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:50,255 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:50,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2024-11-14 05:53:50,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (65)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:50,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:50,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:50,857 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:50,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash -418668158, now seen corresponding path program 2 times [2024-11-14 05:53:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217994975] [2024-11-14 05:53:50,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:53:50,857 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 [2024-11-14 05:53:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:50,860 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:50,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (68)] Waiting until timeout for monitored process [2024-11-14 05:53:51,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:53:51,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:51,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 05:53:51,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:51,213 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 [2024-11-14 05:53:51,220 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 [2024-11-14 05:53:52,248 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-14 05:53:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:52,280 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 21 treesize of output 14 [2024-11-14 05:53:52,295 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:52,295 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 [2024-11-14 05:53:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:52,791 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 21 treesize of output 14 [2024-11-14 05:53:52,810 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:52,810 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 [2024-11-14 05:53:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-11-14 05:53:52,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:53,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:53:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217994975] [2024-11-14 05:53:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217994975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148079352] [2024-11-14 05:53:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:53:53,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:53:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:53:53,495 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:53:53,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2024-11-14 05:53:53,816 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:53:53,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:53,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 05:53:53,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:53,844 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 [2024-11-14 05:53:53,852 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 [2024-11-14 05:53:54,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:54,313 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 21 treesize of output 14 [2024-11-14 05:53:54,345 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:54,346 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 [2024-11-14 05:53:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:54,665 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 21 treesize of output 14 [2024-11-14 05:53:54,699 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:54,699 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 [2024-11-14 05:53:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-11-14 05:53:54,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:55,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148079352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324692426] [2024-11-14 05:53:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 05:53:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:55,101 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:55,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-14 05:53:55,302 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 05:53:55,302 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:55,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 05:53:55,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:55,332 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 [2024-11-14 05:53:55,342 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 [2024-11-14 05:53:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:55,844 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 21 treesize of output 14 [2024-11-14 05:53:55,861 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:55,861 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 [2024-11-14 05:53:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:56,231 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 21 treesize of output 14 [2024-11-14 05:53:56,246 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:53:56,247 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 [2024-11-14 05:53:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-11-14 05:53:56,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324692426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:56,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:56,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2024-11-14 05:53:56,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034181146] [2024-11-14 05:53:56,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:56,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:53:56,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:53:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:53:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2024-11-14 05:53:56,696 INFO L87 Difference]: Start difference. First operand 184 states and 221 transitions. Second operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 05:53:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:59,099 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2024-11-14 05:53:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:53:59,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2024-11-14 05:53:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:59,102 INFO L225 Difference]: With dead ends: 212 [2024-11-14 05:53:59,102 INFO L226 Difference]: Without dead ends: 212 [2024-11-14 05:53:59,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=123, Invalid=692, Unknown=1, NotChecked=54, Total=870 [2024-11-14 05:53:59,103 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 83 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:59,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 598 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 608 Invalid, 0 Unknown, 119 Unchecked, 1.7s Time] [2024-11-14 05:53:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-14 05:53:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 196. [2024-11-14 05:53:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 170 states have (on average 1.2823529411764707) internal successors, (218), 181 states have internal predecessors, (218), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:53:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2024-11-14 05:53:59,113 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 39 [2024-11-14 05:53:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:59,113 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2024-11-14 05:53:59,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 05:53:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2024-11-14 05:53:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:53:59,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:59,114 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:59,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2024-11-14 05:53:59,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:59,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (68)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:59,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:53:59,720 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:53:59,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1671420046, now seen corresponding path program 1 times [2024-11-14 05:53:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:53:59,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514013945] [2024-11-14 05:53:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:59,721 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 [2024-11-14 05:53:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:53:59,728 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:53:59,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (71)] Waiting until timeout for monitored process [2024-11-14 05:53:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:59,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:53:59,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:59,960 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 6 treesize of output 7 [2024-11-14 05:54:00,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:54:00,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2024-11-14 05:54:00,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:54:00,532 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 16 treesize of output 13 [2024-11-14 05:54:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:00,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:00,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:54:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514013945] [2024-11-14 05:54:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514013945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225875737] [2024-11-14 05:54:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:00,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:54:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:54:00,893 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:54:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2024-11-14 05:54:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:01,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:54:01,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:01,289 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 6 treesize of output 7 [2024-11-14 05:54:01,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:54:01,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2024-11-14 05:54:02,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:54:02,246 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 16 treesize of output 13 [2024-11-14 05:54:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:02,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:02,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225875737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:02,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364154555] [2024-11-14 05:54:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:02,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:02,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:02,443 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:02,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-14 05:54:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:02,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:54:02,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:02,659 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 6 treesize of output 7 [2024-11-14 05:54:02,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:54:02,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2024-11-14 05:54:03,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:54:03,154 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 16 treesize of output 13 [2024-11-14 05:54:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:03,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364154555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:03,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2024-11-14 05:54:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229248229] [2024-11-14 05:54:03,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:03,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:54:03,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:54:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:54:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:54:03,347 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:54:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:04,329 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2024-11-14 05:54:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:54:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2024-11-14 05:54:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:04,331 INFO L225 Difference]: With dead ends: 215 [2024-11-14 05:54:04,331 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 05:54:04,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:54:04,332 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 36 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:04,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 566 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:54:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 05:54:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2024-11-14 05:54:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2651933701657458) internal successors, (229), 192 states have internal predecessors, (229), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:54:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2024-11-14 05:54:04,348 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 39 [2024-11-14 05:54:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:04,349 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2024-11-14 05:54:04,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:54:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2024-11-14 05:54:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:54:04,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:04,350 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:04,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-14 05:54:04,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2024-11-14 05:54:04,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (71)] Ended with exit code 0 [2024-11-14 05:54:04,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:54:04,951 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:54:04,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash 343337355, now seen corresponding path program 1 times [2024-11-14 05:54:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:54:04,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697993645] [2024-11-14 05:54:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:04,952 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 [2024-11-14 05:54:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:54:04,954 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:54:04,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (74)] Waiting until timeout for monitored process [2024-11-14 05:54:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:05,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:54:05,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:05,194 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 [2024-11-14 05:54:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:06,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:08,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:54:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697993645] [2024-11-14 05:54:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697993645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:08,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984044997] [2024-11-14 05:54:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:54:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:54:08,087 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:54:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2024-11-14 05:54:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:08,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:54:08,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:08,462 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 [2024-11-14 05:54:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:10,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984044997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560115666] [2024-11-14 05:54:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:12,449 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:12,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-14 05:54:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:12,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:54:12,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:12,672 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 [2024-11-14 05:54:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:13,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560115666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:15,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:54:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 16, 13, 14, 12] total 47 [2024-11-14 05:54:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993726379] [2024-11-14 05:54:15,464 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:15,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:54:15,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:54:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:54:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:54:15,466 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand has 48 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:54:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:24,202 INFO L93 Difference]: Finished difference Result 279 states and 319 transitions. [2024-11-14 05:54:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 05:54:24,203 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2024-11-14 05:54:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:24,204 INFO L225 Difference]: With dead ends: 279 [2024-11-14 05:54:24,204 INFO L226 Difference]: Without dead ends: 279 [2024-11-14 05:54:24,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=524, Invalid=3766, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:54:24,207 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 425 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:24,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1544 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 05:54:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-14 05:54:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 207. [2024-11-14 05:54:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2651933701657458) internal successors, (229), 192 states have internal predecessors, (229), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:54:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2024-11-14 05:54:24,216 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 39 [2024-11-14 05:54:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:24,216 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2024-11-14 05:54:24,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.6) internal successors, (117), 43 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:54:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2024-11-14 05:54:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:54:24,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:24,217 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:24,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2024-11-14 05:54:24,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (74)] Forceful destruction successful, exit code 0 [2024-11-14 05:54:24,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-14 05:54:24,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:24,819 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:54:24,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash 440864117, now seen corresponding path program 1 times [2024-11-14 05:54:24,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:54:24,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594837560] [2024-11-14 05:54:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:24,820 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 [2024-11-14 05:54:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:54:24,821 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:54:24,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (77)] Waiting until timeout for monitored process [2024-11-14 05:54:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:25,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:54:25,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:25,043 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 [2024-11-14 05:54:25,254 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 05:54:25,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:54:25,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:54:25,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:54:25,607 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 16 treesize of output 13 [2024-11-14 05:54:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:54:25,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:25,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-14 05:54:26,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:54:26,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594837560] [2024-11-14 05:54:26,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594837560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:26,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1071328366] [2024-11-14 05:54:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:26,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:54:26,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:54:26,820 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:54:26,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2024-11-14 05:54:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:27,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 05:54:27,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:27,228 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 [2024-11-14 05:54:27,592 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:54:27,592 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 [2024-11-14 05:54:27,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:54:28,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:54:28,043 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 16 treesize of output 13 [2024-11-14 05:54:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:54:28,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:28,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-14 05:54:28,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:28,206 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 50 treesize of output 56 [2024-11-14 05:54:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1071328366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657261100] [2024-11-14 05:54:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:28,640 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:28,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-14 05:54:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:28,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:54:28,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:28,858 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 [2024-11-14 05:54:29,005 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:54:29,005 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 [2024-11-14 05:54:29,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:54:29,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:54:29,214 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 16 treesize of output 13 [2024-11-14 05:54:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:54:29,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:29,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-14 05:54:29,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:29,402 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 50 treesize of output 56 [2024-11-14 05:54:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657261100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:29,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:29,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 21 [2024-11-14 05:54:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267063470] [2024-11-14 05:54:29,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:29,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 05:54:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:54:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 05:54:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:54:29,749 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:54:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:31,515 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2024-11-14 05:54:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:54:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2024-11-14 05:54:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:31,517 INFO L225 Difference]: With dead ends: 250 [2024-11-14 05:54:31,517 INFO L226 Difference]: Without dead ends: 250 [2024-11-14 05:54:31,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 05:54:31,518 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 143 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:31,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 651 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 05:54:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-14 05:54:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 204. [2024-11-14 05:54:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.2808988764044944) internal successors, (228), 189 states have internal predecessors, (228), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:54:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 248 transitions. [2024-11-14 05:54:31,527 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 248 transitions. Word has length 40 [2024-11-14 05:54:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:31,528 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 248 transitions. [2024-11-14 05:54:31,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 05:54:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 248 transitions. [2024-11-14 05:54:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:54:31,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:31,529 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:31,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-14 05:54:31,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2024-11-14 05:54:31,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (77)] Forceful destruction successful, exit code 0 [2024-11-14 05:54:32,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:54:32,130 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:54:32,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2088024479, now seen corresponding path program 1 times [2024-11-14 05:54:32,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:54:32,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233850161] [2024-11-14 05:54:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:32,131 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 [2024-11-14 05:54:32,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:54:32,133 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:54:32,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (80)] Waiting until timeout for monitored process [2024-11-14 05:54:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:32,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:54:32,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:32,426 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 [2024-11-14 05:54:32,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:54:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:54:33,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:54:34,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:54:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233850161] [2024-11-14 05:54:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233850161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151197042] [2024-11-14 05:54:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:34,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:54:34,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:54:34,682 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:54:34,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2024-11-14 05:54:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:35,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 05:54:35,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:54:35,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:54:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151197042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384596344] [2024-11-14 05:54:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:35,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:35,846 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:35,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-14 05:54:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:36,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:54:36,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:36,034 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 [2024-11-14 05:54:36,578 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:54:36,578 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 [2024-11-14 05:54:36,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:54:37,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:54:37,336 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 16 treesize of output 13 [2024-11-14 05:54:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:54:37,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:37,665 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 8 treesize of output 6 [2024-11-14 05:54:37,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-14 05:54:38,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384596344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:38,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2024-11-14 05:54:38,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12, 9, 13] total 45 [2024-11-14 05:54:38,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817530475] [2024-11-14 05:54:38,749 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:38,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:54:38,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:54:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:54:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:54:38,751 INFO L87 Difference]: Start difference. First operand 204 states and 248 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 41 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:54:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:50,292 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2024-11-14 05:54:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 05:54:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 41 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2024-11-14 05:54:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:50,295 INFO L225 Difference]: With dead ends: 298 [2024-11-14 05:54:50,295 INFO L226 Difference]: Without dead ends: 298 [2024-11-14 05:54:50,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1045, Invalid=8075, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 05:54:50,298 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 719 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:50,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1778 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-14 05:54:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-14 05:54:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 197. [2024-11-14 05:54:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.280701754385965) internal successors, (219), 182 states have internal predecessors, (219), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:54:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 239 transitions. [2024-11-14 05:54:50,310 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 239 transitions. Word has length 40 [2024-11-14 05:54:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:50,310 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 239 transitions. [2024-11-14 05:54:50,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 41 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-14 05:54:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 239 transitions. [2024-11-14 05:54:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:54:50,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:50,312 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:50,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-11-14 05:54:50,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2024-11-14 05:54:50,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (80)] Ended with exit code 0 [2024-11-14 05:54:50,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:54:50,913 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:54:50,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1165381427, now seen corresponding path program 1 times [2024-11-14 05:54:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:54:50,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111845611] [2024-11-14 05:54:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:50,914 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 [2024-11-14 05:54:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:54:50,916 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:54:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (83)] Waiting until timeout for monitored process [2024-11-14 05:54:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:51,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:54:51,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:54:51,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:52,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-14 05:54:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:54:52,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:54:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111845611] [2024-11-14 05:54:52,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111845611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:52,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138859662] [2024-11-14 05:54:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:52,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:54:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:54:52,541 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:54:52,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2024-11-14 05:54:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:52,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:54:52,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:54:53,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:57,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-14 05:54:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:54:57,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138859662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290967408] [2024-11-14 05:54:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:57,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:57,603 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-11-14 05:54:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:57,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:54:57,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:54:58,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:02,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-14 05:55:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:55:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290967408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:02,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:55:02,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 19 [2024-11-14 05:55:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774805691] [2024-11-14 05:55:02,520 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:02,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:55:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:55:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:55:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=323, Unknown=4, NotChecked=0, Total=380 [2024-11-14 05:55:02,521 INFO L87 Difference]: Start difference. First operand 197 states and 239 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 05:55:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:04,350 INFO L93 Difference]: Finished difference Result 198 states and 236 transitions. [2024-11-14 05:55:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:55:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2024-11-14 05:55:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:04,352 INFO L225 Difference]: With dead ends: 198 [2024-11-14 05:55:04,352 INFO L226 Difference]: Without dead ends: 198 [2024-11-14 05:55:04,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=117, Invalid=691, Unknown=4, NotChecked=0, Total=812 [2024-11-14 05:55:04,353 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 89 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:04,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 534 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:55:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-14 05:55:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2024-11-14 05:55:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.2545454545454546) internal successors, (207), 175 states have internal predecessors, (207), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:55:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2024-11-14 05:55:04,360 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 41 [2024-11-14 05:55:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:04,360 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2024-11-14 05:55:04,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 05:55:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2024-11-14 05:55:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:55:04,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:04,361 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:04,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (83)] Ended with exit code 0 [2024-11-14 05:55:04,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2024-11-14 05:55:04,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-11-14 05:55:04,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:04,963 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:55:04,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2053523457, now seen corresponding path program 1 times [2024-11-14 05:55:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:55:04,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598025179] [2024-11-14 05:55:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:04,964 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 [2024-11-14 05:55:04,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:55:04,966 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:55:04,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (86)] Waiting until timeout for monitored process [2024-11-14 05:55:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:05,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:55:05,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:05,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:55:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:05,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:09,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:55:09,732 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 20 treesize of output 16 [2024-11-14 05:55:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:55:09,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:55:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598025179] [2024-11-14 05:55:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598025179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1272323191] [2024-11-14 05:55:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:09,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:55:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:55:09,835 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:55:09,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2024-11-14 05:55:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:10,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:55:10,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:10,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:10,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:11,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:55:11,053 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 20 treesize of output 16 [2024-11-14 05:55:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:55:11,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1272323191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535123259] [2024-11-14 05:55:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:11,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:11,090 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:11,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-11-14 05:55:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:11,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:55:11,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:11,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:11,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:11,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:55:11,771 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 20 treesize of output 16 [2024-11-14 05:55:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:55:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535123259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:11,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:55:11,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11, 7, 11, 7] total 21 [2024-11-14 05:55:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901767768] [2024-11-14 05:55:11,803 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:11,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 05:55:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:55:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 05:55:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=393, Unknown=2, NotChecked=0, Total=462 [2024-11-14 05:55:11,805 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:55:14,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:55:16,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:55:18,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:55:20,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:55:22,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:55:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:23,311 INFO L93 Difference]: Finished difference Result 229 states and 265 transitions. [2024-11-14 05:55:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:55:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-11-14 05:55:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:23,313 INFO L225 Difference]: With dead ends: 229 [2024-11-14 05:55:23,313 INFO L226 Difference]: Without dead ends: 229 [2024-11-14 05:55:23,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=148, Invalid=780, Unknown=2, NotChecked=0, Total=930 [2024-11-14 05:55:23,314 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 204 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:23,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 727 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 5 Unknown, 0 Unchecked, 11.1s Time] [2024-11-14 05:55:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-14 05:55:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 194. [2024-11-14 05:55:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 168 states have (on average 1.25) internal successors, (210), 179 states have internal predecessors, (210), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 05:55:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2024-11-14 05:55:23,321 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 40 [2024-11-14 05:55:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:23,321 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2024-11-14 05:55:23,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:55:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2024-11-14 05:55:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:55:23,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:23,322 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:23,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2024-11-14 05:55:23,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (86)] Forceful destruction successful, exit code 0 [2024-11-14 05:55:23,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2024-11-14 05:55:23,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:55:23,923 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:55:23,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:23,923 INFO L85 PathProgramCache]: Analyzing trace with hash 83109461, now seen corresponding path program 1 times [2024-11-14 05:55:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:55:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206298464] [2024-11-14 05:55:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:23,924 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 [2024-11-14 05:55:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:55:23,926 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:55:23,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (89)] Waiting until timeout for monitored process [2024-11-14 05:55:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:24,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:55:24,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:24,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:24,572 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-14 05:55:24,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:55:24,578 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 9 treesize of output 7 [2024-11-14 05:55:24,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:55:25,147 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_53| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 1))) (and (= (_ bv0 1) (bvadd v_DerPreprocessor_2 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_53| v_DerPreprocessor_2) (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_53|))) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_53| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_53|))))) is different from true [2024-11-14 05:55:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:25,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:27,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-14 05:55:27,610 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 46 treesize of output 44 [2024-11-14 05:55:35,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:55:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206298464] [2024-11-14 05:55:35,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206298464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303078858] [2024-11-14 05:55:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:35,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:55:35,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:55:35,279 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:55:35,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2024-11-14 05:55:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:35,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:55:35,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:36,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:36,467 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-14 05:55:36,467 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 11 treesize of output 7 [2024-11-14 05:55:36,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:55:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:37,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:39,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-14 05:55:39,350 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 46 treesize of output 44 [2024-11-14 05:55:48,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303078858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511713380] [2024-11-14 05:55:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:48,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:48,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:48,052 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:48,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-11-14 05:55:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:48,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 05:55:48,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:48,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:48,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:55:49,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:56:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:56:14,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:56:15,234 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 19 treesize of output 17 [2024-11-14 05:56:17,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2024-11-14 05:56:17,719 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 88 treesize of output 84 [2024-11-14 05:56:54,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511713380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:56:54,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:56:54,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 28 [2024-11-14 05:56:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415453030] [2024-11-14 05:56:54,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:56:54,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 05:56:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:56:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 05:56:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2036, Unknown=19, NotChecked=94, Total=2450 [2024-11-14 05:56:54,106 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 27 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:56:56,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:56:58,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:00,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:02,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:04,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:05,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:11,197 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2024-11-14 05:57:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:57:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 27 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2024-11-14 05:57:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:11,199 INFO L225 Difference]: With dead ends: 211 [2024-11-14 05:57:11,199 INFO L226 Difference]: Without dead ends: 193 [2024-11-14 05:57:11,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 161 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=422, Invalid=2869, Unknown=19, NotChecked=112, Total=3422 [2024-11-14 05:57:11,201 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 71 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:11,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 509 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 519 Invalid, 5 Unknown, 100 Unchecked, 12.3s Time] [2024-11-14 05:57:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-14 05:57:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2024-11-14 05:57:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 163 states have (on average 1.2515337423312884) internal successors, (204), 175 states have internal predecessors, (204), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-14 05:57:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 223 transitions. [2024-11-14 05:57:11,207 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 223 transitions. Word has length 41 [2024-11-14 05:57:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:11,207 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 223 transitions. [2024-11-14 05:57:11,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 27 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 05:57:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 223 transitions. [2024-11-14 05:57:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:57:11,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:11,209 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:11,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2024-11-14 05:57:11,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (89)] Forceful destruction successful, exit code 0 [2024-11-14 05:57:11,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-11-14 05:57:11,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:11,810 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:57:11,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1767085852, now seen corresponding path program 1 times [2024-11-14 05:57:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:57:11,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069999711] [2024-11-14 05:57:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:11,811 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 [2024-11-14 05:57:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:57:11,813 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:57:11,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (92)] Waiting until timeout for monitored process [2024-11-14 05:57:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:12,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:57:12,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:12,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:57:12,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:57:12,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:57:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069999711] [2024-11-14 05:57:12,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069999711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:12,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [738147809] [2024-11-14 05:57:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:12,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:57:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:57:12,767 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:57:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2024-11-14 05:57:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:13,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:57:13,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:13,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:57:13,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:57:13,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [738147809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333627065] [2024-11-14 05:57:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:13,504 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:13,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-11-14 05:57:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:13,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:57:13,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:13,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:57:13,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:57:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333627065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:14,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:57:14,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12, 8, 12, 8] total 17 [2024-11-14 05:57:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691333008] [2024-11-14 05:57:14,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:14,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:57:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:57:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:57:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:57:14,063 INFO L87 Difference]: Start difference. First operand 189 states and 223 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 05:57:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:15,703 INFO L93 Difference]: Finished difference Result 202 states and 238 transitions. [2024-11-14 05:57:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:57:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-11-14 05:57:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:15,705 INFO L225 Difference]: With dead ends: 202 [2024-11-14 05:57:15,705 INFO L226 Difference]: Without dead ends: 202 [2024-11-14 05:57:15,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:57:15,706 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:15,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 491 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:57:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-14 05:57:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2024-11-14 05:57:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 177 states have internal predecessors, (206), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-14 05:57:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 225 transitions. [2024-11-14 05:57:15,715 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 225 transitions. Word has length 42 [2024-11-14 05:57:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:15,715 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 225 transitions. [2024-11-14 05:57:15,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-14 05:57:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 225 transitions. [2024-11-14 05:57:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:57:15,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:15,716 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:15,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (92)] Ended with exit code 0 [2024-11-14 05:57:15,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-11-14 05:57:16,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2024-11-14 05:57:16,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:57:16,321 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:57:16,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash -765282134, now seen corresponding path program 1 times [2024-11-14 05:57:16,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:57:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290219532] [2024-11-14 05:57:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:16,322 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 [2024-11-14 05:57:16,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:57:16,324 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:57:16,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (95)] Waiting until timeout for monitored process [2024-11-14 05:57:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:16,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 05:57:16,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:16,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:57:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:16,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:17,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:57:17,348 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 24 treesize of output 20 [2024-11-14 05:57:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:57:17,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:57:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290219532] [2024-11-14 05:57:17,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290219532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45813287] [2024-11-14 05:57:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:17,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:57:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:57:17,494 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:57:17,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2024-11-14 05:57:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:17,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:57:17,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:18,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:19,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 05:57:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:19,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:19,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:57:19,360 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 24 treesize of output 20 [2024-11-14 05:57:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:57:19,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45813287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:19,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839370455] [2024-11-14 05:57:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:19,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:19,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:19,460 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:19,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-11-14 05:57:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:19,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:57:19,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:20,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:20,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:20,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 05:57:20,811 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 24 treesize of output 20 [2024-11-14 05:57:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:57:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839370455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:20,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:57:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 34 [2024-11-14 05:57:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916975857] [2024-11-14 05:57:20,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:20,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 05:57:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:57:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 05:57:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:57:20,860 INFO L87 Difference]: Start difference. First operand 191 states and 225 transitions. Second operand has 35 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 05:57:22,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:24,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:27,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:29,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:31,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:34,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:36,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:38,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:40,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:43,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:45,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:47,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:57:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:47,478 INFO L93 Difference]: Finished difference Result 217 states and 250 transitions. [2024-11-14 05:57:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:57:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 41 [2024-11-14 05:57:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:47,480 INFO L225 Difference]: With dead ends: 217 [2024-11-14 05:57:47,480 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 05:57:47,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 05:57:47,481 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 278 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 13 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:47,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 795 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 686 Invalid, 12 Unknown, 0 Unchecked, 25.9s Time] [2024-11-14 05:57:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 05:57:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2024-11-14 05:57:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 182 states have internal predecessors, (211), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-14 05:57:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2024-11-14 05:57:47,488 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 41 [2024-11-14 05:57:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:47,489 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2024-11-14 05:57:47,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 05:57:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2024-11-14 05:57:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:57:47,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:47,490 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:47,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-11-14 05:57:47,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2024-11-14 05:57:47,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (95)] Forceful destruction successful, exit code 0 [2024-11-14 05:57:48,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:57:48,091 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:57:48,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -997637265, now seen corresponding path program 3 times [2024-11-14 05:57:48,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:57:48,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244373589] [2024-11-14 05:57:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:57:48,092 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 [2024-11-14 05:57:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:57:48,094 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:57:48,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (98)] Waiting until timeout for monitored process [2024-11-14 05:57:48,325 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:57:48,326 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:57:48,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:57:48,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:48,399 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 [2024-11-14 05:57:48,406 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 [2024-11-14 05:57:49,008 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-14 05:57:49,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:49,034 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 16 treesize of output 11 [2024-11-14 05:57:49,049 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:49,049 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 [2024-11-14 05:57:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:49,471 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 16 treesize of output 11 [2024-11-14 05:57:49,485 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:49,486 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 [2024-11-14 05:57:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 4 not checked. [2024-11-14 05:57:49,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:50,075 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:57:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244373589] [2024-11-14 05:57:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244373589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244599621] [2024-11-14 05:57:50,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:57:50,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:57:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:57:50,077 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:57:50,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2024-11-14 05:57:50,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:57:50,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:57:50,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 05:57:50,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:50,540 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 [2024-11-14 05:57:50,547 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 [2024-11-14 05:57:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:50,983 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 16 treesize of output 11 [2024-11-14 05:57:51,013 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:51,013 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 [2024-11-14 05:57:51,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:51,265 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 16 treesize of output 11 [2024-11-14 05:57:51,306 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:51,306 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 [2024-11-14 05:57:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 4 not checked. [2024-11-14 05:57:51,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244599621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192080420] [2024-11-14 05:57:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:57:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:51,690 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:51,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-11-14 05:57:51,909 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:57:51,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:57:51,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 05:57:51,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:51,931 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 [2024-11-14 05:57:51,940 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 [2024-11-14 05:57:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:52,264 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 16 treesize of output 11 [2024-11-14 05:57:52,283 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:52,283 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 [2024-11-14 05:57:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:57:52,439 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 16 treesize of output 11 [2024-11-14 05:57:52,460 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:57:52,460 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 [2024-11-14 05:57:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 4 not checked. [2024-11-14 05:57:52,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192080420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:52,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2024-11-14 05:57:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081286879] [2024-11-14 05:57:52,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:52,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:57:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:57:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:57:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2024-11-14 05:57:52,845 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 05:57:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:54,541 INFO L93 Difference]: Finished difference Result 197 states and 229 transitions. [2024-11-14 05:57:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:57:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2024-11-14 05:57:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:54,543 INFO L225 Difference]: With dead ends: 197 [2024-11-14 05:57:54,543 INFO L226 Difference]: Without dead ends: 197 [2024-11-14 05:57:54,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=111, Invalid=542, Unknown=1, NotChecked=48, Total=702 [2024-11-14 05:57:54,544 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 100 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:54,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 423 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 375 Invalid, 0 Unknown, 91 Unchecked, 1.0s Time] [2024-11-14 05:57:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-14 05:57:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2024-11-14 05:57:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 160 states have (on average 1.25) internal successors, (200), 172 states have internal predecessors, (200), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 05:57:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 213 transitions. [2024-11-14 05:57:54,551 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 213 transitions. Word has length 42 [2024-11-14 05:57:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:54,551 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 213 transitions. [2024-11-14 05:57:54,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 05:57:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 213 transitions. [2024-11-14 05:57:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:57:54,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:54,552 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:54,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-11-14 05:57:54,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2024-11-14 05:57:54,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (98)] Forceful destruction successful, exit code 0 [2024-11-14 05:57:55,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:57:55,153 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:57:55,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1531340904, now seen corresponding path program 1 times [2024-11-14 05:57:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:57:55,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037146953] [2024-11-14 05:57:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:55,154 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 [2024-11-14 05:57:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:57:55,156 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:57:55,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (101)] Waiting until timeout for monitored process [2024-11-14 05:57:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:55,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:57:55,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:55,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:57:56,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-14 05:58:00,595 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_67| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_67|)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_67| (_ bv0 1)) |c_#valid|))) is different from true [2024-11-14 05:58:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:58:00,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:58:00,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-14 05:58:01,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-11-14 05:58:15,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:58:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037146953] [2024-11-14 05:58:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037146953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:58:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491639266] [2024-11-14 05:58:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:58:15,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:58:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:58:15,987 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:58:15,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2024-11-14 05:58:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:16,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:58:16,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:58:19,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:58:20,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 38 treesize of output 22 [2024-11-14 05:58:21,171 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_69| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_69|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_69| (_ bv0 32))) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_69| (_ bv0 1)) |c_#valid|))) (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1))) is different from true [2024-11-14 05:58:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:58:21,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:58:26,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 108 [2024-11-14 05:58:43,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491639266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:58:43,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911666757] [2024-11-14 05:58:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:58:43,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:58:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:58:43,080 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:58:43,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-11-14 05:58:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:43,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 05:58:43,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:58:48,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:58:49,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-14 05:58:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:58:58,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:58:58,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-14 05:58:58,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-11-14 05:59:01,403 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (= (bvadd (bvmul |c_ULTIMATE.start_alloc_17_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_alloc_17_~array#1.offset|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|)) (.cse3 (= |c_ULTIMATE.start_entry_point_~array~0#1.base| |c_ULTIMATE.start_alloc_17_~array#1.base|))) (let ((.cse7 (forall ((v_ArrVal_1680 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| (_ BitVec 32)) (v_antiDerIndex_entry0_5 (_ BitVec 32)) (v_arrayElimCell_173 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|))) (= (_ bv0 1) (let ((.cse9 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| v_ArrVal_1680))) (bvadd (select .cse9 v_antiDerIndex_entry0_5) (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse9 |c_ULTIMATE.start_entry_point_~array~0#1.base|)) v_arrayElimCell_173 (select .cse9 v_arrayElimCell_173)) v_antiDerIndex_entry0_5))))))) (.cse2 (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|))))) (.cse5 (not .cse3)) (.cse6 (not .cse4))) (and (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|))) (forall ((v_ArrVal_1680 (_ BitVec 1)) (v_antiDerIndex_entry0_5 (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| v_ArrVal_1680))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse1 |c_ULTIMATE.start_entry_point_~array~0#1.base|)))) (or (forall ((v_arrayElimCell_173 (_ BitVec 32))) (= (_ bv0 1) (bvadd (select |c_#valid| v_antiDerIndex_entry0_5) (select (store .cse0 v_arrayElimCell_173 (select .cse1 v_arrayElimCell_173)) v_antiDerIndex_entry0_5)))) (= (_ bv0 1) (bvadd (select .cse1 v_antiDerIndex_entry0_5) (select (store .cse0 |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| v_ArrVal_1680) v_antiDerIndex_entry0_5))))))))) (or (and (or .cse2 .cse3) (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|)))) (or .cse2 .cse4)) (and (forall ((v_arrayElimCell_174 (_ BitVec 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_174) (_ bv0 1))) (or .cse5 .cse6))) (or .cse3 .cse7) (or .cse7 .cse4) (or .cse2 (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base|))) (or .cse5 (forall ((v_ArrVal_1680 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| (_ BitVec 32)) (v_antiDerIndex_entry0_5 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312|))) (= (_ bv0 1) (let ((.cse8 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| v_ArrVal_1680))) (bvadd (select .cse8 v_antiDerIndex_entry0_5) (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse8 |c_ULTIMATE.start_entry_point_~array~0#1.base|)) |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_312| v_ArrVal_1680) v_antiDerIndex_entry0_5)))))) .cse6)))) is different from false [2024-11-14 05:59:01,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911666757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:59:01,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:59:01,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 36 [2024-11-14 05:59:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639093216] [2024-11-14 05:59:01,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:59:01,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 05:59:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:59:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 05:59:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1946, Unknown=27, NotChecked=276, Total=2450 [2024-11-14 05:59:01,415 INFO L87 Difference]: Start difference. First operand 185 states and 213 transitions. Second operand has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 05:59:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:59:09,076 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2024-11-14 05:59:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:59:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-11-14 05:59:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:59:09,078 INFO L225 Difference]: With dead ends: 191 [2024-11-14 05:59:09,078 INFO L226 Difference]: Without dead ends: 165 [2024-11-14 05:59:09,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=357, Invalid=3287, Unknown=28, NotChecked=360, Total=4032 [2024-11-14 05:59:09,079 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 22 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:59:09,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 857 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1066 Invalid, 12 Unknown, 224 Unchecked, 3.5s Time] [2024-11-14 05:59:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-14 05:59:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2024-11-14 05:59:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.2826086956521738) internal successors, (177), 150 states have internal predecessors, (177), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:59:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2024-11-14 05:59:09,084 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 42 [2024-11-14 05:59:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:59:09,084 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2024-11-14 05:59:09,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 05:59:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2024-11-14 05:59:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:59:09,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:59:09,085 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:59:09,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2024-11-14 05:59:09,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (101)] Forceful destruction successful, exit code 0 [2024-11-14 05:59:09,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2024-11-14 05:59:09,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:59:09,686 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:59:09,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:59:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1054913548, now seen corresponding path program 1 times [2024-11-14 05:59:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:59:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886354732] [2024-11-14 05:59:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:09,687 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 [2024-11-14 05:59:09,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:59:09,690 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:59:09,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (104)] Waiting until timeout for monitored process [2024-11-14 05:59:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:09,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:59:09,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:10,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:11,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:59:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:59:11,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:59:12,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:59:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886354732] [2024-11-14 05:59:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886354732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [69124380] [2024-11-14 05:59:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:12,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:59:12,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:59:12,499 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:59:12,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2024-11-14 05:59:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:12,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:59:12,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:13,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:14,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:59:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:14,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:59:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [69124380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:14,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441464090] [2024-11-14 05:59:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:14,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:59:14,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:59:14,235 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:59:14,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-11-14 05:59:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:14,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:59:14,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:14,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:15,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 05:59:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:15,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:59:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441464090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:15,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:59:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 13, 8, 13, 8] total 32 [2024-11-14 05:59:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080449855] [2024-11-14 05:59:15,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:59:15,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:59:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:59:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:59:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:59:15,201 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 05:59:17,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:59:19,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:59:22,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:59:27,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:59:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:59:29,264 INFO L93 Difference]: Finished difference Result 188 states and 217 transitions. [2024-11-14 05:59:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:59:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2024-11-14 05:59:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:59:29,266 INFO L225 Difference]: With dead ends: 188 [2024-11-14 05:59:29,266 INFO L226 Difference]: Without dead ends: 188 [2024-11-14 05:59:29,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 220 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:59:29,267 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 218 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:59:29,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 865 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 871 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2024-11-14 05:59:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-14 05:59:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2024-11-14 05:59:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 140 states have (on average 1.2785714285714285) internal successors, (179), 152 states have internal predecessors, (179), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:59:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2024-11-14 05:59:29,273 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 43 [2024-11-14 05:59:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:59:29,273 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2024-11-14 05:59:29,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 05:59:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2024-11-14 05:59:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 05:59:29,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:59:29,275 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:59:29,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (104)] Ended with exit code 0 [2024-11-14 05:59:29,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-11-14 05:59:29,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2024-11-14 05:59:29,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 05:59:29,876 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:59:29,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:59:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1657418266, now seen corresponding path program 1 times [2024-11-14 05:59:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:59:29,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525088103] [2024-11-14 05:59:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:29,877 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 [2024-11-14 05:59:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:59:29,881 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:59:29,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (107)] Waiting until timeout for monitored process [2024-11-14 05:59:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:30,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:59:30,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:30,263 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 [2024-11-14 05:59:30,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:30,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 05:59:30,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:59:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:30,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:31,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:59:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525088103] [2024-11-14 05:59:31,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525088103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527952197] [2024-11-14 05:59:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:59:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:59:31,316 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:59:31,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2024-11-14 05:59:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:31,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:59:31,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:31,757 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 [2024-11-14 05:59:31,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:31,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 05:59:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:59:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:31,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527952197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740511880] [2024-11-14 05:59:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:34,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:59:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:59:34,260 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:59:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-11-14 05:59:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:34,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:59:34,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:34,601 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 [2024-11-14 05:59:34,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:34,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 05:59:34,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 05:59:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:34,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:59:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740511880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:39,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:59:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 20 [2024-11-14 05:59:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581160583] [2024-11-14 05:59:39,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:59:39,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:59:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:59:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:59:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=369, Unknown=1, NotChecked=0, Total=420 [2024-11-14 05:59:39,184 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:59:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:59:42,615 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2024-11-14 05:59:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:59:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2024-11-14 05:59:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:59:42,617 INFO L225 Difference]: With dead ends: 165 [2024-11-14 05:59:42,617 INFO L226 Difference]: Without dead ends: 165 [2024-11-14 05:59:42,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=174, Invalid=1385, Unknown=1, NotChecked=0, Total=1560 [2024-11-14 05:59:42,617 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:59:42,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 539 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 05:59:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-14 05:59:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-14 05:59:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 154 states have internal predecessors, (181), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:59:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2024-11-14 05:59:42,622 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 44 [2024-11-14 05:59:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:59:42,623 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2024-11-14 05:59:42,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 05:59:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2024-11-14 05:59:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:59:42,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:59:42,624 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:59:42,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-11-14 05:59:42,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2024-11-14 05:59:43,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (107)] Ended with exit code 0 [2024-11-14 05:59:43,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 05:59:43,225 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 05:59:43,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:59:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 159641423, now seen corresponding path program 1 times [2024-11-14 05:59:43,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:59:43,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576665660] [2024-11-14 05:59:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:43,226 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 [2024-11-14 05:59:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:59:43,228 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 05:59:43,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (110)] Waiting until timeout for monitored process [2024-11-14 05:59:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:43,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:59:43,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:43,535 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 [2024-11-14 05:59:43,880 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-14 05:59:43,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:59:44,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:44,248 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 7 treesize of output 5 [2024-11-14 05:59:46,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:59:46,683 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 16 treesize of output 13 [2024-11-14 05:59:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:59:46,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:59:48,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:59:48,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576665660] [2024-11-14 05:59:48,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576665660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:48,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829823453] [2024-11-14 05:59:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:59:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:59:48,213 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:59:48,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2024-11-14 05:59:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:48,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:59:48,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:48,755 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 [2024-11-14 05:59:49,014 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:59:49,014 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 [2024-11-14 05:59:49,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:49,314 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 7 treesize of output 5 [2024-11-14 05:59:51,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:59:51,597 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 16 treesize of output 13 [2024-11-14 05:59:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:59:51,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:56,072 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 8 treesize of output 6 [2024-11-14 05:59:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:59:56,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829823453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921896937] [2024-11-14 05:59:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:59:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:59:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:59:56,526 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:59:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-11-14 05:59:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:59:56,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:59:56,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:59:56,806 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 [2024-11-14 05:59:56,957 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-14 05:59:56,957 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 [2024-11-14 05:59:57,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:59:59,205 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_92| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_92|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_92|))) is different from true [2024-11-14 05:59:59,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-14 05:59:59,500 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 16 treesize of output 13 [2024-11-14 05:59:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2024-11-14 05:59:59,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:59,627 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 8 treesize of output 6 [2024-11-14 06:00:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 06:00:00,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921896937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:00,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:00:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 13] total 39 [2024-11-14 06:00:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674952508] [2024-11-14 06:00:00,323 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:00:00,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 06:00:00,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:00:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 06:00:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=4, NotChecked=74, Total=1560 [2024-11-14 06:00:00,324 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-14 06:00:02,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:04,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:06,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:09,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:11,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:17,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:00:18,915 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2024-11-14 06:00:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 06:00:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 45 [2024-11-14 06:00:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:00:18,917 INFO L225 Difference]: With dead ends: 178 [2024-11-14 06:00:18,917 INFO L226 Difference]: Without dead ends: 178 [2024-11-14 06:00:18,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=4, NotChecked=110, Total=3306 [2024-11-14 06:00:18,918 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 129 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 22 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2024-11-14 06:00:18,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 935 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1042 Invalid, 6 Unknown, 115 Unchecked, 14.7s Time] [2024-11-14 06:00:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-14 06:00:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-14 06:00:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 147 states have (on average 1.272108843537415) internal successors, (187), 159 states have internal predecessors, (187), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 06:00:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-11-14 06:00:18,923 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 45 [2024-11-14 06:00:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:00:18,924 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-11-14 06:00:18,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-14 06:00:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-11-14 06:00:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 06:00:18,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:00:18,925 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:00:18,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2024-11-14 06:00:19,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-11-14 06:00:19,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (110)] Ended with exit code 0 [2024-11-14 06:00:19,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 06:00:19,526 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:00:19,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:00:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash -833507098, now seen corresponding path program 2 times [2024-11-14 06:00:19,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:00:19,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126746253] [2024-11-14 06:00:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:19,527 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 [2024-11-14 06:00:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:00:19,532 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:00:19,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (113)] Waiting until timeout for monitored process [2024-11-14 06:00:19,779 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:19,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:19,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 06:00:19,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:19,863 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 [2024-11-14 06:00:20,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:00:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 06:00:21,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:00:22,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:00:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126746253] [2024-11-14 06:00:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126746253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031865956] [2024-11-14 06:00:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:00:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:00:22,218 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:00:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2024-11-14 06:00:22,716 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:22,716 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:22,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 06:00:22,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:00:23,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:00:23,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031865956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259709813] [2024-11-14 06:00:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:00:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:00:23,820 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:00:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-11-14 06:00:24,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:24,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:24,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 06:00:24,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:24,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 06:00:25,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-14 06:00:25,715 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 16 treesize of output 13 [2024-11-14 06:00:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:00:25,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:28,183 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 46 treesize of output 42 [2024-11-14 06:00:28,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-14 06:00:28,783 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 26 treesize of output 22 [2024-11-14 06:00:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 06:00:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259709813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:29,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:00:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13, 10, 12, 11] total 50 [2024-11-14 06:00:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153333739] [2024-11-14 06:00:29,512 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:00:29,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 06:00:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:00:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 06:00:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2248, Unknown=1, NotChecked=0, Total=2450 [2024-11-14 06:00:29,514 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 50 states, 50 states have (on average 3.0) internal successors, (150), 47 states have internal predecessors, (150), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 06:00:31,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:39,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:00:41,256 INFO L93 Difference]: Finished difference Result 309 states and 359 transitions. [2024-11-14 06:00:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 06:00:41,257 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.0) internal successors, (150), 47 states have internal predecessors, (150), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2024-11-14 06:00:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:00:41,258 INFO L225 Difference]: With dead ends: 309 [2024-11-14 06:00:41,258 INFO L226 Difference]: Without dead ends: 309 [2024-11-14 06:00:41,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=673, Invalid=6636, Unknown=1, NotChecked=0, Total=7310 [2024-11-14 06:00:41,259 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 460 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-14 06:00:41,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1335 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1247 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2024-11-14 06:00:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-14 06:00:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2024-11-14 06:00:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 241 states have (on average 1.2904564315352698) internal successors, (311), 250 states have internal predecessors, (311), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:00:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 331 transitions. [2024-11-14 06:00:41,267 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 331 transitions. Word has length 44 [2024-11-14 06:00:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:00:41,268 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 331 transitions. [2024-11-14 06:00:41,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.0) internal successors, (150), 47 states have internal predecessors, (150), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 06:00:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 331 transitions. [2024-11-14 06:00:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 06:00:41,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:00:41,269 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:00:41,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (113)] Ended with exit code 0 [2024-11-14 06:00:41,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2024-11-14 06:00:41,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-11-14 06:00:41,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:00:41,870 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:00:41,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:00:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1528256199, now seen corresponding path program 2 times [2024-11-14 06:00:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:00:41,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979259587] [2024-11-14 06:00:41,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:41,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 06:00:41,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:00:41,873 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:00:41,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (116)] Waiting until timeout for monitored process [2024-11-14 06:00:42,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:42,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:42,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 06:00:42,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:42,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 06:00:42,862 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2024-11-14 06:00:42,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-11-14 06:00:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 06:00:43,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:43,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 06:00:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 06:00:44,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:00:44,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979259587] [2024-11-14 06:00:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979259587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433498925] [2024-11-14 06:00:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:44,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:00:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:00:44,331 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:00:44,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2024-11-14 06:00:44,903 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:44,904 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:44,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 06:00:44,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:45,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 06:00:46,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 06:00:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 06:00:46,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433498925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:00:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523762903] [2024-11-14 06:00:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:00:48,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:00:48,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:00:48,863 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:00:48,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-11-14 06:00:49,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:00:49,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:49,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 06:00:49,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:49,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 06:00:50,390 INFO L349 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2024-11-14 06:00:50,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-14 06:00:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 06:00:50,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:00:53,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-14 06:00:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 06:00:53,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523762903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:00:53,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2024-11-14 06:00:53,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14, 15, 11] total 37 [2024-11-14 06:00:53,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618452191] [2024-11-14 06:00:53,194 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2024-11-14 06:00:53,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 06:00:53,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:00:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 06:00:53,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1281, Unknown=2, NotChecked=0, Total=1482 [2024-11-14 06:00:53,196 INFO L87 Difference]: Start difference. First operand 268 states and 331 transitions. Second operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-14 06:00:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:00:56,690 INFO L93 Difference]: Finished difference Result 275 states and 340 transitions. [2024-11-14 06:00:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 06:00:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2024-11-14 06:00:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:00:56,692 INFO L225 Difference]: With dead ends: 275 [2024-11-14 06:00:56,692 INFO L226 Difference]: Without dead ends: 275 [2024-11-14 06:00:56,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=346, Invalid=2102, Unknown=2, NotChecked=0, Total=2450 [2024-11-14 06:00:56,693 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 214 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 06:00:56,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 580 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 06:00:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-14 06:00:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2024-11-14 06:00:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 244 states have (on average 1.2950819672131149) internal successors, (316), 253 states have internal predecessors, (316), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:00:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 336 transitions. [2024-11-14 06:00:56,700 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 336 transitions. Word has length 46 [2024-11-14 06:00:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:00:56,700 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 336 transitions. [2024-11-14 06:00:56,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-14 06:00:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 336 transitions. [2024-11-14 06:00:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 06:00:56,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:00:56,701 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:00:56,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (116)] Ended with exit code 0 [2024-11-14 06:00:56,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2024-11-14 06:00:57,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (117)] Forceful destruction successful, exit code 0 [2024-11-14 06:00:57,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 06:00:57,302 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:00:57,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:00:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash 654459708, now seen corresponding path program 3 times [2024-11-14 06:00:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:00:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771850742] [2024-11-14 06:00:57,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 06:00:57,303 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 [2024-11-14 06:00:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:00:57,305 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:00:57,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (119)] Waiting until timeout for monitored process [2024-11-14 06:00:57,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 06:00:57,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:00:57,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 06:00:57,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:00:57,793 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 [2024-11-14 06:01:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:00,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:01:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:07,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:01:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771850742] [2024-11-14 06:01:07,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771850742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:01:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [601264756] [2024-11-14 06:01:07,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 06:01:07,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:01:07,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:01:07,469 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:01:07,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2024-11-14 06:01:08,273 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 06:01:08,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:01:08,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 06:01:08,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:01:08,310 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 [2024-11-14 06:01:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:11,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:01:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:29,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [601264756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:01:29,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900497437] [2024-11-14 06:01:29,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 06:01:29,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:01:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:01:29,181 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:01:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-11-14 06:01:34,438 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 06:01:34,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:01:34,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 06:01:34,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:01:34,481 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 [2024-11-14 06:01:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:36,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:01:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:01:51,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900497437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:01:51,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:01:51,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 26, 24, 24, 22] total 82 [2024-11-14 06:01:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726613149] [2024-11-14 06:01:51,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:01:51,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 06:01:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:01:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 06:01:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=5428, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 06:01:51,145 INFO L87 Difference]: Start difference. First operand 271 states and 336 transitions. Second operand has 83 states, 80 states have (on average 2.15) internal successors, (172), 79 states have internal predecessors, (172), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 06:03:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:03:45,814 INFO L93 Difference]: Finished difference Result 322 states and 409 transitions. [2024-11-14 06:03:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 06:03:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 80 states have (on average 2.15) internal successors, (172), 79 states have internal predecessors, (172), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-11-14 06:03:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:03:45,817 INFO L225 Difference]: With dead ends: 322 [2024-11-14 06:03:45,817 INFO L226 Difference]: Without dead ends: 322 [2024-11-14 06:03:45,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 137.5s TimeCoverageRelationStatistics Valid=2875, Invalid=10001, Unknown=6, NotChecked=0, Total=12882 [2024-11-14 06:03:45,823 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 318 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-14 06:03:45,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1193 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-11-14 06:03:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-14 06:03:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 307. [2024-11-14 06:03:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 280 states have (on average 1.3) internal successors, (364), 289 states have internal predecessors, (364), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:03:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 384 transitions. [2024-11-14 06:03:45,833 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 384 transitions. Word has length 44 [2024-11-14 06:03:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:03:45,834 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 384 transitions. [2024-11-14 06:03:45,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 80 states have (on average 2.15) internal successors, (172), 79 states have internal predecessors, (172), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 06:03:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 384 transitions. [2024-11-14 06:03:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 06:03:45,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:03:45,835 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:03:45,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (120)] Ended with exit code 0 [2024-11-14 06:03:46,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2024-11-14 06:03:46,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (119)] Ended with exit code 0 [2024-11-14 06:03:46,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 06:03:46,436 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:03:46,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:03:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -131301774, now seen corresponding path program 2 times [2024-11-14 06:03:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:03:46,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580374893] [2024-11-14 06:03:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:03:46,437 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 [2024-11-14 06:03:46,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:03:46,438 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:03:46,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (122)] Waiting until timeout for monitored process [2024-11-14 06:03:46,735 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:03:46,735 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:03:46,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 06:03:46,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:03:46,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:03:47,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-14 06:03:47,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 06:03:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 06:03:47,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:03:47,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:03:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580374893] [2024-11-14 06:03:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580374893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:03:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264044588] [2024-11-14 06:03:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:03:47,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:03:47,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:03:47,835 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:03:47,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2024-11-14 06:03:48,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:03:48,322 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:03:48,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 06:03:48,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:03:48,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:03:49,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 06:03:49,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 06:03:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 06:03:49,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:03:49,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264044588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:03:49,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271500624] [2024-11-14 06:03:49,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:03:49,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:03:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:03:49,825 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:03:49,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-11-14 06:03:50,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:03:50,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:03:50,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 06:03:50,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:03:50,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:03:50,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 06:03:50,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 06:03:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 06:03:50,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:03:50,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271500624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:03:50,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 06:03:50,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 23 [2024-11-14 06:03:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786085300] [2024-11-14 06:03:50,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 06:03:50,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 06:03:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:03:50,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 06:03:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2024-11-14 06:03:50,838 INFO L87 Difference]: Start difference. First operand 307 states and 384 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 06:03:52,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:03:54,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:03:57,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:03:59,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:02,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:04:03,102 INFO L93 Difference]: Finished difference Result 406 states and 508 transitions. [2024-11-14 06:04:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 06:04:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2024-11-14 06:04:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:04:03,104 INFO L225 Difference]: With dead ends: 406 [2024-11-14 06:04:03,104 INFO L226 Difference]: Without dead ends: 406 [2024-11-14 06:04:03,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-11-14 06:04:03,105 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 163 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 10 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2024-11-14 06:04:03,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 733 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 708 Invalid, 5 Unknown, 0 Unchecked, 11.9s Time] [2024-11-14 06:04:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2024-11-14 06:04:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 331. [2024-11-14 06:04:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 300 states have (on average 1.2966666666666666) internal successors, (389), 310 states have internal predecessors, (389), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-14 06:04:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 415 transitions. [2024-11-14 06:04:03,111 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 415 transitions. Word has length 47 [2024-11-14 06:04:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:04:03,111 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 415 transitions. [2024-11-14 06:04:03,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 06:04:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 415 transitions. [2024-11-14 06:04:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 06:04:03,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:04:03,112 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:04:03,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2024-11-14 06:04:03,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2024-11-14 06:04:03,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (122)] Ended with exit code 0 [2024-11-14 06:04:03,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 06:04:03,713 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:04:03,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:04:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 224612443, now seen corresponding path program 2 times [2024-11-14 06:04:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:04:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065761551] [2024-11-14 06:04:03,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:03,714 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 [2024-11-14 06:04:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:04:03,716 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:04:03,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (125)] Waiting until timeout for monitored process [2024-11-14 06:04:03,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:03,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:03,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 06:04:03,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:04,041 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 [2024-11-14 06:04:04,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:04:04,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 06:04:04,364 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)))) is different from true [2024-11-14 06:04:04,411 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-14 06:04:04,411 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 18 treesize of output 24 [2024-11-14 06:04:04,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-14 06:04:04,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 06:04:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2024-11-14 06:04:04,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:09,065 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:04:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065761551] [2024-11-14 06:04:09,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065761551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:04:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279786564] [2024-11-14 06:04:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:04:09,068 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:04:09,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2024-11-14 06:04:09,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:09,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:09,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 06:04:09,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:10,086 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 [2024-11-14 06:04:10,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:04:10,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 06:04:10,769 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-14 06:04:10,769 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 18 treesize of output 24 [2024-11-14 06:04:10,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-14 06:04:11,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 06:04:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2024-11-14 06:04:11,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279786564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:04:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431718859] [2024-11-14 06:04:13,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:04:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:04:13,508 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:04:13,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-11-14 06:04:13,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:13,777 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:13,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 06:04:13,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:13,877 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 [2024-11-14 06:04:14,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 06:04:14,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 06:04:14,315 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-14 06:04:14,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-14 06:04:14,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-14 06:04:14,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 06:04:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 06:04:14,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431718859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 06:04:16,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 06:04:16,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 24 [2024-11-14 06:04:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095856232] [2024-11-14 06:04:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 06:04:16,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 06:04:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:04:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 06:04:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=4, NotChecked=48, Total=702 [2024-11-14 06:04:16,835 INFO L87 Difference]: Start difference. First operand 331 states and 415 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 06:04:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:04:19,483 INFO L93 Difference]: Finished difference Result 345 states and 429 transitions. [2024-11-14 06:04:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 06:04:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2024-11-14 06:04:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:04:19,484 INFO L225 Difference]: With dead ends: 345 [2024-11-14 06:04:19,484 INFO L226 Difference]: Without dead ends: 345 [2024-11-14 06:04:19,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=4, NotChecked=56, Total=930 [2024-11-14 06:04:19,485 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 72 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 06:04:19,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 592 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 595 Invalid, 0 Unknown, 115 Unchecked, 1.8s Time] [2024-11-14 06:04:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-14 06:04:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2024-11-14 06:04:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 306 states have (on average 1.2908496732026145) internal successors, (395), 316 states have internal predecessors, (395), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-14 06:04:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 421 transitions. [2024-11-14 06:04:19,490 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 421 transitions. Word has length 48 [2024-11-14 06:04:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:04:19,490 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 421 transitions. [2024-11-14 06:04:19,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-14 06:04:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 421 transitions. [2024-11-14 06:04:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 06:04:19,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:04:19,491 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:04:19,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (125)] Ended with exit code 0 [2024-11-14 06:04:19,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2024-11-14 06:04:19,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2024-11-14 06:04:20,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:20,092 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:04:20,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:04:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -592787931, now seen corresponding path program 4 times [2024-11-14 06:04:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:04:20,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120185593] [2024-11-14 06:04:20,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 06:04:20,093 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 [2024-11-14 06:04:20,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:04:20,096 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:04:20,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (128)] Waiting until timeout for monitored process [2024-11-14 06:04:20,388 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 06:04:20,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:20,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 06:04:20,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:20,459 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 [2024-11-14 06:04:20,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:04:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 06:04:21,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 06:04:22,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:04:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120185593] [2024-11-14 06:04:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120185593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535058283] [2024-11-14 06:04:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 06:04:22,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:04:22,795 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:04:22,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2024-11-14 06:04:23,271 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 06:04:23,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:23,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 06:04:23,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 06:04:24,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 06:04:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535058283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008307030] [2024-11-14 06:04:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 06:04:24,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:04:24,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:04:24,663 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:04:24,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-11-14 06:04:24,929 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 06:04:24,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:24,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 06:04:24,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 06:04:25,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 06:04:25,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008307030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:25,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:04:25,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12, 10, 12, 10] total 30 [2024-11-14 06:04:25,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537615794] [2024-11-14 06:04:25,689 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:04:25,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 06:04:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:04:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 06:04:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2024-11-14 06:04:25,691 INFO L87 Difference]: Start difference. First operand 337 states and 421 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 06:04:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:04:28,976 INFO L93 Difference]: Finished difference Result 300 states and 359 transitions. [2024-11-14 06:04:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 06:04:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2024-11-14 06:04:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:04:28,979 INFO L225 Difference]: With dead ends: 300 [2024-11-14 06:04:28,979 INFO L226 Difference]: Without dead ends: 300 [2024-11-14 06:04:28,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 06:04:28,980 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 264 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 06:04:28,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 957 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 06:04:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-14 06:04:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2024-11-14 06:04:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 266 states have (on average 1.2744360902255638) internal successors, (339), 277 states have internal predecessors, (339), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:04:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 359 transitions. [2024-11-14 06:04:28,989 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 359 transitions. Word has length 49 [2024-11-14 06:04:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:04:28,990 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 359 transitions. [2024-11-14 06:04:28,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-14 06:04:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 359 transitions. [2024-11-14 06:04:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 06:04:28,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:04:28,992 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:04:29,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (129)] Ended with exit code 0 [2024-11-14 06:04:29,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (128)] Forceful destruction successful, exit code 0 [2024-11-14 06:04:29,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2024-11-14 06:04:29,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:04:29,593 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:04:29,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:04:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1348893101, now seen corresponding path program 1 times [2024-11-14 06:04:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:04:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101154188] [2024-11-14 06:04:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 06:04:29,593 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 [2024-11-14 06:04:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:04:29,598 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:04:29,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (131)] Waiting until timeout for monitored process [2024-11-14 06:04:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 06:04:29,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 06:04:29,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:30,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:30,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:04:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101154188] [2024-11-14 06:04:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101154188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1285251140] [2024-11-14 06:04:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 06:04:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:04:30,268 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:04:30,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2024-11-14 06:04:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 06:04:30,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 06:04:30,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:30,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1285251140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053375626] [2024-11-14 06:04:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 06:04:30,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:04:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:04:30,965 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:04:30,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-11-14 06:04:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 06:04:31,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 06:04:31,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:31,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 06:04:31,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053375626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:31,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:04:31,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2024-11-14 06:04:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687167708] [2024-11-14 06:04:31,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:04:31,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 06:04:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:04:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 06:04:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 06:04:31,678 INFO L87 Difference]: Start difference. First operand 295 states and 359 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 06:04:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:04:32,022 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2024-11-14 06:04:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 06:04:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 48 [2024-11-14 06:04:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:04:32,024 INFO L225 Difference]: With dead ends: 297 [2024-11-14 06:04:32,024 INFO L226 Difference]: Without dead ends: 297 [2024-11-14 06:04:32,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 06:04:32,025 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 06:04:32,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 349 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 06:04:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-14 06:04:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2024-11-14 06:04:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 268 states have (on average 1.25) internal successors, (335), 279 states have internal predecessors, (335), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:04:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 355 transitions. [2024-11-14 06:04:32,031 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 355 transitions. Word has length 48 [2024-11-14 06:04:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:04:32,031 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 355 transitions. [2024-11-14 06:04:32,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 06:04:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 355 transitions. [2024-11-14 06:04:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 06:04:32,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:04:32,032 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:04:32,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2024-11-14 06:04:32,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (131)] Forceful destruction successful, exit code 0 [2024-11-14 06:04:32,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (132)] Ended with exit code 0 [2024-11-14 06:04:32,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:32,633 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:04:32,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:04:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1805421437, now seen corresponding path program 2 times [2024-11-14 06:04:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:04:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303970671] [2024-11-14 06:04:32,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:32,634 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 [2024-11-14 06:04:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:04:32,635 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:04:32,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (134)] Waiting until timeout for monitored process [2024-11-14 06:04:32,898 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:32,898 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:32,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 06:04:32,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:32,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:04:33,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-14 06:04:33,481 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-14 06:04:33,481 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 16 treesize of output 17 [2024-11-14 06:04:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:04:33,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:33,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 06:04:33,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2024-11-14 06:04:34,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 17 treesize of output 15 [2024-11-14 06:04:34,306 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 20 treesize of output 16 [2024-11-14 06:04:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:04:34,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:04:34,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303970671] [2024-11-14 06:04:34,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303970671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:34,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654737573] [2024-11-14 06:04:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:34,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:04:34,455 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:04:34,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2024-11-14 06:04:34,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 06:04:34,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268884316] [2024-11-14 06:04:34,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:34,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:04:34,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:04:34,951 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:04:34,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (135)] Ended with exit code 1 [2024-11-14 06:04:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-11-14 06:04:35,221 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:35,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:35,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 06:04:35,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:35,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:04:35,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-14 06:04:35,839 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-14 06:04:35,840 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 16 treesize of output 17 [2024-11-14 06:04:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:04:35,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:36,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 06:04:36,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2024-11-14 06:04:36,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 13 treesize of output 11 [2024-11-14 06:04:36,953 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 18 treesize of output 16 [2024-11-14 06:04:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:04:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268884316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:36,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-14 06:04:36,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9] total 22 [2024-11-14 06:04:36,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849120280] [2024-11-14 06:04:36,989 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-14 06:04:36,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 06:04:36,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:04:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 06:04:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-14 06:04:36,991 INFO L87 Difference]: Start difference. First operand 297 states and 355 transitions. Second operand has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 06:04:39,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:41,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:44,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:46,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:04:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:04:47,562 INFO L93 Difference]: Finished difference Result 327 states and 384 transitions. [2024-11-14 06:04:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 06:04:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2024-11-14 06:04:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:04:47,563 INFO L225 Difference]: With dead ends: 327 [2024-11-14 06:04:47,563 INFO L226 Difference]: Without dead ends: 327 [2024-11-14 06:04:47,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2024-11-14 06:04:47,564 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 72 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-11-14 06:04:47,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 787 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 521 Invalid, 4 Unknown, 0 Unchecked, 10.0s Time] [2024-11-14 06:04:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-14 06:04:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 302. [2024-11-14 06:04:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 273 states have (on average 1.2454212454212454) internal successors, (340), 284 states have internal predecessors, (340), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 06:04:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 360 transitions. [2024-11-14 06:04:47,569 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 360 transitions. Word has length 47 [2024-11-14 06:04:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:04:47,570 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 360 transitions. [2024-11-14 06:04:47,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 06:04:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 360 transitions. [2024-11-14 06:04:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 06:04:47,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:04:47,571 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:04:47,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-11-14 06:04:47,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (134)] Forceful destruction successful, exit code 0 [2024-11-14 06:04:47,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 06:04:47,972 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:04:47,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:04:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash 664615706, now seen corresponding path program 2 times [2024-11-14 06:04:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:04:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800403253] [2024-11-14 06:04:47,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:47,972 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 [2024-11-14 06:04:47,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:04:47,974 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:04:47,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (137)] Waiting until timeout for monitored process [2024-11-14 06:04:48,225 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:48,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:48,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 06:04:48,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:48,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 06:04:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:04:50,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:04:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:04:56,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:04:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800403253] [2024-11-14 06:04:56,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800403253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:04:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636531655] [2024-11-14 06:04:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:04:56,611 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:04:56,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:04:56,612 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:04:56,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2024-11-14 06:04:57,111 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:04:57,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:04:57,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 06:04:57,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:04:57,146 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 [2024-11-14 06:05:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:00,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:05:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636531655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:05:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323783505] [2024-11-14 06:05:08,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:05:08,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:05:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:05:08,345 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:05:08,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-11-14 06:05:08,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:05:08,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:05:08,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 06:05:08,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:05:08,728 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 [2024-11-14 06:05:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:10,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:05:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:19,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323783505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:05:19,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 06:05:19,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 19, 16, 18, 16] total 63 [2024-11-14 06:05:19,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466302566] [2024-11-14 06:05:19,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 06:05:19,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 06:05:19,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:05:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 06:05:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3626, Unknown=2, NotChecked=0, Total=4032 [2024-11-14 06:05:19,290 INFO L87 Difference]: Start difference. First operand 302 states and 360 transitions. Second operand has 64 states, 62 states have (on average 2.7096774193548385) internal successors, (168), 59 states have internal predecessors, (168), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 06:05:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 06:05:36,333 INFO L93 Difference]: Finished difference Result 407 states and 485 transitions. [2024-11-14 06:05:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 06:05:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 2.7096774193548385) internal successors, (168), 59 states have internal predecessors, (168), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2024-11-14 06:05:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 06:05:36,335 INFO L225 Difference]: With dead ends: 407 [2024-11-14 06:05:36,335 INFO L226 Difference]: Without dead ends: 407 [2024-11-14 06:05:36,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=921, Invalid=6559, Unknown=2, NotChecked=0, Total=7482 [2024-11-14 06:05:36,336 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 859 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-14 06:05:36,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1803 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-14 06:05:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-14 06:05:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 338. [2024-11-14 06:05:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 308 states have (on average 1.2694805194805194) internal successors, (391), 319 states have internal predecessors, (391), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-14 06:05:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 414 transitions. [2024-11-14 06:05:36,343 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 414 transitions. Word has length 47 [2024-11-14 06:05:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 06:05:36,343 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 414 transitions. [2024-11-14 06:05:36,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 2.7096774193548385) internal successors, (168), 59 states have internal predecessors, (168), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 06:05:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 414 transitions. [2024-11-14 06:05:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 06:05:36,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 06:05:36,344 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 06:05:36,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2024-11-14 06:05:36,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (138)] Ended with exit code 0 [2024-11-14 06:05:36,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (137)] Forceful destruction successful, exit code 0 [2024-11-14 06:05:36,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 [2024-11-14 06:05:36,945 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-14 06:05:36,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 06:05:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash -871749550, now seen corresponding path program 2 times [2024-11-14 06:05:36,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 06:05:36,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005535219] [2024-11-14 06:05:36,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:05:36,946 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 [2024-11-14 06:05:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 06:05:36,948 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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) [2024-11-14 06:05:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/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 (140)] Waiting until timeout for monitored process [2024-11-14 06:05:37,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:05:37,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:05:37,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 06:05:37,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:05:37,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:05:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:37,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:05:44,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 06:05:44,174 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 20 treesize of output 16 [2024-11-14 06:05:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 06:05:44,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 06:05:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005535219] [2024-11-14 06:05:44,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005535219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:05:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987987709] [2024-11-14 06:05:44,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:05:44,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 06:05:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 06:05:44,385 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 06:05:44,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2024-11-14 06:05:44,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 06:05:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436621200] [2024-11-14 06:05:44,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 06:05:44,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 06:05:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 06:05:44,909 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 06:05:44,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (141)] Ended with exit code 1 [2024-11-14 06:05:44,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0437c2-6995-4441-8e0c-6118547ea021/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-11-14 06:05:45,189 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 06:05:45,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 06:05:45,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 06:05:45,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 06:05:45,498 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 [2024-11-14 06:05:46,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 06:05:46,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 06:05:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:48,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 06:05:50,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-14 06:05:50,189 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 20 treesize of output 16 [2024-11-14 06:05:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 06:05:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436621200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 06:05:51,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-14 06:05:51,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 17, 10] total 39 [2024-11-14 06:05:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109927516] [2024-11-14 06:05:51,215 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-14 06:05:51,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 06:05:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 06:05:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 06:05:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1426, Unknown=3, NotChecked=0, Total=1560 [2024-11-14 06:05:51,216 INFO L87 Difference]: Start difference. First operand 338 states and 414 transitions. Second operand has 40 states, 38 states have (on average 3.736842105263158) internal successors, (142), 39 states have internal predecessors, (142), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 06:05:54,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 06:06:00,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:06:03,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-14 06:06:05,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]