./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/busybox-1.22.0/head-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/head-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e7c6e6d6b508cc7e8b4b8b024471ff0eb17f579c7977a910bbe95623e5bb1a4e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:36,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:36,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-19 05:15:36,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:36,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:36,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:36,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:36,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:36,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:36,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:36,540 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:36,541 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:36,542 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:36,544 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:15:36,545 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:36,546 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:36,547 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:15:36,551 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:15:36,551 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:36,552 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:15:36,552 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:15:36,553 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:15:36,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:15:36,554 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:15:36,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:36,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:36,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:36,557 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:15:36,557 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:15:36,557 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:15:36,559 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:36,559 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:15:36,559 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:15:36,559 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:36,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:36,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:36,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:36,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:36,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:36,561 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:15:36,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:15:36,562 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:36,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:36,562 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c6e6d6b508cc7e8b4b8b024471ff0eb17f579c7977a910bbe95623e5bb1a4e [2023-11-19 05:15:36,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:36,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:36,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:36,998 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:36,999 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:37,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/busybox-1.22.0/head-2.i [2023-11-19 05:15:40,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:15:40,538 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:15:40,538 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/sv-benchmarks/c/busybox-1.22.0/head-2.i [2023-11-19 05:15:40,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/60d2a55c0/4648ca57f6f8401f9c5d355e4c9c6055/FLAGa8e3f17b4 [2023-11-19 05:15:40,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/60d2a55c0/4648ca57f6f8401f9c5d355e4c9c6055 [2023-11-19 05:15:40,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:15:40,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:15:40,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:40,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:15:40,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:15:40,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:40" (1/1) ... [2023-11-19 05:15:40,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103e2009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:40, skipping insertion in model container [2023-11-19 05:15:40,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:40" (1/1) ... [2023-11-19 05:15:40,739 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:42,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:42,063 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-19 05:15:42,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52986bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:42, skipping insertion in model container [2023-11-19 05:15:42,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:42,064 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 05:15:42,066 INFO L158 Benchmark]: Toolchain (without parser) took 1456.10ms. Allocated memory is still 174.1MB. Free memory was 100.3MB in the beginning and 123.9MB in the end (delta: -23.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:15:42,066 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 174.1MB. Free memory is still 145.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:15:42,067 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1418.98ms. Allocated memory is still 174.1MB. Free memory was 145.5MB in the beginning and 123.9MB in the end (delta: 21.7MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2023-11-19 05:15:42,069 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 174.1MB. Free memory is still 145.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1418.98ms. Allocated memory is still 174.1MB. Free memory was 145.5MB in the beginning and 123.9MB in the end (delta: 21.7MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2251]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/head-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e7c6e6d6b508cc7e8b4b8b024471ff0eb17f579c7977a910bbe95623e5bb1a4e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:44,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:44,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-11-19 05:15:44,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:44,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:44,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:44,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:44,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:44,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:44,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:44,686 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:44,686 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:44,687 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:44,688 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:44,689 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:44,689 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:44,690 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:15:44,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:15:44,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:44,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:44,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:44,694 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:15:44,695 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:15:44,695 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:15:44,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:44,696 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:15:44,696 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 05:15:44,697 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 05:15:44,697 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:15:44,698 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:44,699 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:44,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 05:15:44,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:44,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:44,700 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:44,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:44,702 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 05:15:44,702 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:44,702 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:44,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:44,703 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c6e6d6b508cc7e8b4b8b024471ff0eb17f579c7977a910bbe95623e5bb1a4e [2023-11-19 05:15:45,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:45,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:45,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:45,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:45,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:45,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/busybox-1.22.0/head-2.i [2023-11-19 05:15:48,274 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:15:48,842 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:15:48,843 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/sv-benchmarks/c/busybox-1.22.0/head-2.i [2023-11-19 05:15:48,891 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/ecf76c5d5/854d389609bd4950bca5a30dfdea7bfb/FLAG8f563947d [2023-11-19 05:15:48,911 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/data/ecf76c5d5/854d389609bd4950bca5a30dfdea7bfb [2023-11-19 05:15:48,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:15:48,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:15:48,923 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:48,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:15:48,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:15:48,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:48" (1/1) ... [2023-11-19 05:15:48,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5803ff8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:48, skipping insertion in model container [2023-11-19 05:15:48,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:48" (1/1) ... [2023-11-19 05:15:49,034 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:50,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:50,533 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 05:15:50,563 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:50,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:50,741 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:15:50,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:51,252 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function strtoull is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function ferror is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function fclose is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,253 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,254 WARN L675 CHandler]: The function fputs is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,254 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:51,262 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:15:51,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51 WrapperNode [2023-11-19 05:15:51,263 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:51,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:51,265 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:15:51,265 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:15:51,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,415 INFO L138 Inliner]: procedures = 595, calls = 371, calls flagged for inlining = 30, calls inlined = 28, statements flattened = 1090 [2023-11-19 05:15:51,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:51,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:15:51,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:15:51,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:15:51,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:15:51,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:15:51,615 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:15:51,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:15:51,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (1/1) ... [2023-11-19 05:15:51,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:51,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:15:51,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:15:51,718 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-19 05:15:51,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2023-11-19 05:15:51,719 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2023-11-19 05:15:51,721 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2023-11-19 05:15:51,721 INFO L138 BoogieDeclarations]: Found implementation of procedure _IO_getc [2023-11-19 05:15:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure xrealloc [2023-11-19 05:15:51,722 INFO L138 BoogieDeclarations]: Found implementation of procedure xrealloc [2023-11-19 05:15:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-19 05:15:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:15:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 05:15:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-11-19 05:15:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-19 05:15:51,724 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-19 05:15:51,725 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-19 05:15:51,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:15:51,725 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2023-11-19 05:15:51,725 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-19 05:15:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:15:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:15:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2023-11-19 05:15:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2023-11-19 05:15:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2023-11-19 05:15:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2023-11-19 05:15:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:15:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:15:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-11-19 05:15:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-19 05:15:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-19 05:15:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-19 05:15:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-19 05:15:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure getopt [2023-11-19 05:15:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getopt [2023-11-19 05:15:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 05:15:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 05:15:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 05:15:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-19 05:15:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-19 05:15:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-19 05:15:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:15:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:15:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:15:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:15:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2023-11-19 05:15:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2023-11-19 05:15:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-11-19 05:15:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 05:15:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2023-11-19 05:15:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-11-19 05:15:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2023-11-19 05:15:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2023-11-19 05:15:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-11-19 05:15:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2023-11-19 05:15:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc_fgets [2023-11-19 05:15:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc_fgets [2023-11-19 05:15:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-19 05:15:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-19 05:15:52,399 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:15:52,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:16:00,797 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:16:00,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:16:00,820 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-19 05:16:00,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:16:00 BoogieIcfgContainer [2023-11-19 05:16:00,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:16:00,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:16:00,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:16:00,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:16:00,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:15:48" (1/3) ... [2023-11-19 05:16:00,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad28471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:16:00, skipping insertion in model container [2023-11-19 05:16:00,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:51" (2/3) ... [2023-11-19 05:16:00,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad28471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:16:00, skipping insertion in model container [2023-11-19 05:16:00,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:16:00" (3/3) ... [2023-11-19 05:16:00,847 INFO L112 eAbstractionObserver]: Analyzing ICFG head-2.i [2023-11-19 05:16:00,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:16:00,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 273 error locations. [2023-11-19 05:16:00,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:16:00,952 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@669b248d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:16:00,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 273 error locations. [2023-11-19 05:16:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 773 states, 458 states have (on average 1.8755458515283843) internal successors, (859), 731 states have internal predecessors, (859), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 05:16:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 05:16:00,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:00,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 05:16:00,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [xmalloc_fgetsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 270 more)] === [2023-11-19 05:16:00,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 624664, now seen corresponding path program 1 times [2023-11-19 05:16:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:16:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974058023] [2023-11-19 05:16:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:16:01,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:16:01,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 05:16:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:01,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:16:01,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:01,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-19 05:16:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:01,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:16:01,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:16:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974058023] [2023-11-19 05:16:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974058023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:01,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:01,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:16:01,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841226317] [2023-11-19 05:16:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:01,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:16:01,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:16:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:16:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:01,545 INFO L87 Difference]: Start difference. First operand has 773 states, 458 states have (on average 1.8755458515283843) internal successors, (859), 731 states have internal predecessors, (859), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:04,954 INFO L93 Difference]: Finished difference Result 961 states and 1125 transitions. [2023-11-19 05:16:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:16:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 05:16:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:04,987 INFO L225 Difference]: With dead ends: 961 [2023-11-19 05:16:04,987 INFO L226 Difference]: Without dead ends: 959 [2023-11-19 05:16:04,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:04,992 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 298 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:04,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1290 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-19 05:16:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2023-11-19 05:16:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 755. [2023-11-19 05:16:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 448 states have (on average 1.8169642857142858) internal successors, (814), 718 states have internal predecessors, (814), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:16:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 871 transitions. [2023-11-19 05:16:05,085 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 871 transitions. Word has length 3 [2023-11-19 05:16:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:05,085 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 871 transitions. [2023-11-19 05:16:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 871 transitions. [2023-11-19 05:16:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 05:16:05,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:05,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 05:16:05,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:05,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:05,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [xmalloc_fgetsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 270 more)] === [2023-11-19 05:16:05,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash 624665, now seen corresponding path program 1 times [2023-11-19 05:16:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:16:05,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919466294] [2023-11-19 05:16:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:16:05,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:16:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 05:16:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:05,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:16:05,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:05,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:16:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:05,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:16:05,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:16:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919466294] [2023-11-19 05:16:05,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919466294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:05,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:05,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:16:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282552728] [2023-11-19 05:16:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:05,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:16:05,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:16:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:16:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:05,743 INFO L87 Difference]: Start difference. First operand 755 states and 871 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:09,121 INFO L93 Difference]: Finished difference Result 754 states and 870 transitions. [2023-11-19 05:16:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:16:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 05:16:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:09,127 INFO L225 Difference]: With dead ends: 754 [2023-11-19 05:16:09,127 INFO L226 Difference]: Without dead ends: 754 [2023-11-19 05:16:09,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:09,130 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 13 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:09,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1465 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-19 05:16:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-19 05:16:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-19 05:16:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 448 states have (on average 1.8147321428571428) internal successors, (813), 717 states have internal predecessors, (813), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:16:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 870 transitions. [2023-11-19 05:16:09,193 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 870 transitions. Word has length 3 [2023-11-19 05:16:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:09,194 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 870 transitions. [2023-11-19 05:16:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 870 transitions. [2023-11-19 05:16:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 05:16:09,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:09,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 05:16:09,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:09,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:09,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [xmalloc_fgetsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 270 more)] === [2023-11-19 05:16:09,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1430067273, now seen corresponding path program 1 times [2023-11-19 05:16:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:16:09,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825916389] [2023-11-19 05:16:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:16:09,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:16:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 05:16:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:09,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:16:09,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:09,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:16:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:09,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:16:09,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:16:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825916389] [2023-11-19 05:16:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825916389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:09,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:16:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458558633] [2023-11-19 05:16:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:16:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:16:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:16:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:16:09,998 INFO L87 Difference]: Start difference. First operand 754 states and 870 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:15,298 INFO L93 Difference]: Finished difference Result 758 states and 874 transitions. [2023-11-19 05:16:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:16:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 05:16:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:15,304 INFO L225 Difference]: With dead ends: 758 [2023-11-19 05:16:15,304 INFO L226 Difference]: Without dead ends: 758 [2023-11-19 05:16:15,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:16:15,306 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 14 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:15,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2068 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-19 05:16:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-11-19 05:16:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 756. [2023-11-19 05:16:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 450 states have (on average 1.8111111111111111) internal successors, (815), 719 states have internal predecessors, (815), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:16:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 872 transitions. [2023-11-19 05:16:15,352 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 872 transitions. Word has length 6 [2023-11-19 05:16:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:15,352 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 872 transitions. [2023-11-19 05:16:15,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 872 transitions. [2023-11-19 05:16:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:16:15,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:15,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:15,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-19 05:16:15,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:15,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [xmalloc_fgetsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, xmalloc_fgetsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 270 more)] === [2023-11-19 05:16:15,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -973375988, now seen corresponding path program 1 times [2023-11-19 05:16:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:16:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388831299] [2023-11-19 05:16:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:15,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:15,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:16:15,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:16:15,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-19 05:16:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:15,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:16:15,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:15,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:16:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:16,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:17,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:16:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388831299] [2023-11-19 05:16:17,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388831299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308108209] [2023-11-19 05:16:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:16:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:16:17,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:16:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-19 05:16:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:17,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:16:17,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:17,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:16:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:18,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308108209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030435137] [2023-11-19 05:16:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:18,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:18,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9a7ed3-4722-4ddc-a0d6-03cbbf0a69f6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:16:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:18,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:16:18,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:18,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:16:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:19,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:16:19,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030435137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:19,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:16:19,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2023-11-19 05:16:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43390439] [2023-11-19 05:16:19,603 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:16:19,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:16:19,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:16:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:16:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:16:19,605 INFO L87 Difference]: Start difference. First operand 756 states and 872 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)