./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX --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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:52,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:52,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:14:52,404 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:52,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:52,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:52,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:52,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:52,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:52,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:52,435 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:52,436 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:52,436 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:52,437 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:52,438 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:52,438 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:52,439 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:52,439 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:52,440 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:52,440 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:52,441 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:52,441 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:52,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:14:52,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:14:52,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:52,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:52,444 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:52,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:52,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:52,445 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:14:52,446 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:14:52,446 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:14:52,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:52,447 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:14:52,447 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:14:52,448 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:52,448 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:52,448 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:52,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:52,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:52,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:52,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:52,450 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:52,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:52,450 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:52,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:52,451 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_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-12 00:14:52,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:52,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:52,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:52,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:52,763 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:52,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 00:14:56,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:56,387 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:56,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 00:14:56,397 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/a8120cc65/bb3e4a237b6646229ecb15fb9fbe0572/FLAGd537d3c5d [2023-11-12 00:14:56,413 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/a8120cc65/bb3e4a237b6646229ecb15fb9fbe0572 [2023-11-12 00:14:56,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:56,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:56,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:56,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:56,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:56,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:56" (1/1) ... [2023-11-12 00:14:56,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672174cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:56, skipping insertion in model container [2023-11-12 00:14:56,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:56" (1/1) ... [2023-11-12 00:14:56,455 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:56,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:56,657 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) [2023-11-12 00:14:56,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62fb2edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:56, skipping insertion in model container [2023-11-12 00:14:56,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:56,659 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-12 00:14:56,660 INFO L158 Benchmark]: Toolchain (without parser) took 242.45ms. Allocated memory is still 209.7MB. Free memory was 162.0MB in the beginning and 151.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:14:56,661 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 142.6MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:14:56,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.67ms. Allocated memory is still 209.7MB. Free memory was 161.3MB in the beginning and 151.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:14:56,663 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 142.6MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.67ms. Allocated memory is still 209.7MB. Free memory was 161.3MB in the beginning and 151.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX --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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:59,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:59,303 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-12 00:14:59,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:59,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:59,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:59,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:59,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:59,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:59,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:59,380 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:59,380 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:59,381 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:59,383 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:59,384 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:59,384 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:59,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:14:59,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:14:59,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:59,388 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:59,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:59,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:59,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:59,390 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:14:59,390 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:14:59,391 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:14:59,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:59,392 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:14:59,393 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 00:14:59,393 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 00:14:59,395 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:14:59,396 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:59,396 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:59,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:59,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 00:14:59,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:59,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:59,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:59,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:59,400 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-12 00:14:59,400 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 00:14:59,400 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:59,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:59,401 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_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-12 00:14:59,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:59,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:59,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:59,927 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:59,927 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:59,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 00:15:03,301 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:15:03,581 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:15:03,582 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-12 00:15:03,591 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/f6f4df599/907cdf60f699499abbd12b9ee7ebb7ef/FLAGf79a8ce6d [2023-11-12 00:15:03,605 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/data/f6f4df599/907cdf60f699499abbd12b9ee7ebb7ef [2023-11-12 00:15:03,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:15:03,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:15:03,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:03,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:15:03,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:15:03,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:03" (1/1) ... [2023-11-12 00:15:03,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a224438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:03, skipping insertion in model container [2023-11-12 00:15:03,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:03" (1/1) ... [2023-11-12 00:15:03,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:15:03,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:03,931 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-12 00:15:03,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:15:03,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:04,009 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:15:04,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:04,086 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:15:04,089 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:15:04,098 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:15:04,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04 WrapperNode [2023-11-12 00:15:04,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:04,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:04,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:15:04,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:15:04,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,230 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 159 [2023-11-12 00:15:04,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:04,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:15:04,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:15:04,232 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:15:04,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:15:04,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:15:04,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:15:04,300 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:15:04,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (1/1) ... [2023-11-12 00:15:04,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:15:04,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:04,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:15:04,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:15:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:15:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 00:15:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:15:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-12 00:15:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 00:15:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 00:15:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 00:15:04,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 00:15:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 00:15:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 00:15:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:15:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:15:04,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:15:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:15:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-12 00:15:04,410 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:15:04,604 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:15:04,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:15:05,237 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:15:05,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:15:05,427 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:15:05,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:05 BoogieIcfgContainer [2023-11-12 00:15:05,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:15:05,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:15:05,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:15:05,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:15:05,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:15:03" (1/3) ... [2023-11-12 00:15:05,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c60f3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:05, skipping insertion in model container [2023-11-12 00:15:05,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:04" (2/3) ... [2023-11-12 00:15:05,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c60f3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:05, skipping insertion in model container [2023-11-12 00:15:05,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:05" (3/3) ... [2023-11-12 00:15:05,442 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-12 00:15:05,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:15:05,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-12 00:15:05,468 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:15:05,606 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 00:15:05,659 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:15:05,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 159 transitions, 332 flow [2023-11-12 00:15:05,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 159 transitions, 332 flow [2023-11-12 00:15:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 332 flow [2023-11-12 00:15:05,810 INFO L124 PetriNetUnfolderBase]: 11/157 cut-off events. [2023-11-12 00:15:05,815 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:15:05,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 149 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 109. Up to 3 conditions per place. [2023-11-12 00:15:05,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 1144 [2023-11-12 00:15:32,729 INFO L134 LiptonReduction]: Checked pairs total: 1550 [2023-11-12 00:15:32,730 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-11-12 00:15:32,737 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 37 transitions, 88 flow [2023-11-12 00:15:32,770 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 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) [2023-11-12 00:15:32,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:15:32,793 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;@55cd6966, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:15:32,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-12 00:15:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 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) [2023-11-12 00:15:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:15:32,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:32,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:15:32,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash 23582, now seen corresponding path program 1 times [2023-11-12 00:15:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:32,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629538723] [2023-11-12 00:15:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:32,822 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 [2023-11-12 00:15:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:32,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:32,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:32,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:15:32,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-12 00:15:33,072 INFO L351 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 10 treesize of output 8 [2023-11-12 00:15:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-12 00:15:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,148 INFO L351 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 5 treesize of output 3 [2023-11-12 00:15:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:33,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:33,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629538723] [2023-11-12 00:15:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629538723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:33,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:33,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249784466] [2023-11-12 00:15:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:33,267 INFO L87 Difference]: Start difference. First operand has 198 states, 132 states have (on average 3.727272727272727) internal successors, (492), 197 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:33,476 INFO L93 Difference]: Finished difference Result 161 states and 385 transitions. [2023-11-12 00:15:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:15:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:33,491 INFO L225 Difference]: With dead ends: 161 [2023-11-12 00:15:33,491 INFO L226 Difference]: Without dead ends: 161 [2023-11-12 00:15:33,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:33,496 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:33,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-12 00:15:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-12 00:15:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 112 states have (on average 3.4375) internal successors, (385), 160 states have internal predecessors, (385), 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) [2023-11-12 00:15:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 385 transitions. [2023-11-12 00:15:33,548 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 385 transitions. Word has length 2 [2023-11-12 00:15:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:33,549 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 385 transitions. [2023-11-12 00:15:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 385 transitions. [2023-11-12 00:15:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:15:33,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:33,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:15:33,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-12 00:15:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:33,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 23519, now seen corresponding path program 1 times [2023-11-12 00:15:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702263201] [2023-11-12 00:15:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:33,767 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 [2023-11-12 00:15:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:33,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:33,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:33,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:15:33,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:33,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:15:33,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,948 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:33,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:34,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:34,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:34,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702263201] [2023-11-12 00:15:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702263201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:34,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:34,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247422724] [2023-11-12 00:15:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:34,023 INFO L87 Difference]: Start difference. First operand 161 states and 385 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:34,257 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2023-11-12 00:15:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:15:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:34,261 INFO L225 Difference]: With dead ends: 163 [2023-11-12 00:15:34,261 INFO L226 Difference]: Without dead ends: 163 [2023-11-12 00:15:34,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:34,263 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:34,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-12 00:15:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2023-11-12 00:15:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 113 states have (on average 3.4424778761061945) internal successors, (389), 161 states have internal predecessors, (389), 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) [2023-11-12 00:15:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 389 transitions. [2023-11-12 00:15:34,281 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 389 transitions. Word has length 2 [2023-11-12 00:15:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:34,281 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 389 transitions. [2023-11-12 00:15:34,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 389 transitions. [2023-11-12 00:15:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:15:34,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:34,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:15:34,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:34,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:34,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:34,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash 23521, now seen corresponding path program 1 times [2023-11-12 00:15:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484317264] [2023-11-12 00:15:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:34,504 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 [2023-11-12 00:15:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:34,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:34,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:34,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:15:34,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:34,581 INFO L351 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 [2023-11-12 00:15:34,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:34,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:34,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:34,632 INFO L351 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 1 [2023-11-12 00:15:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:34,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:34,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-12 00:15:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:34,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:34,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484317264] [2023-11-12 00:15:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484317264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:34,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:34,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362007843] [2023-11-12 00:15:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:34,681 INFO L87 Difference]: Start difference. First operand 162 states and 389 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:34,854 INFO L93 Difference]: Finished difference Result 161 states and 387 transitions. [2023-11-12 00:15:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:34,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:15:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:34,857 INFO L225 Difference]: With dead ends: 161 [2023-11-12 00:15:34,857 INFO L226 Difference]: Without dead ends: 161 [2023-11-12 00:15:34,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:34,859 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:34,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-12 00:15:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-12 00:15:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 113 states have (on average 3.424778761061947) internal successors, (387), 160 states have internal predecessors, (387), 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) [2023-11-12 00:15:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 387 transitions. [2023-11-12 00:15:34,873 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 387 transitions. Word has length 2 [2023-11-12 00:15:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:34,873 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 387 transitions. [2023-11-12 00:15:34,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 387 transitions. [2023-11-12 00:15:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:15:34,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:34,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:15:34,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:35,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:35,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:35,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 23581, now seen corresponding path program 1 times [2023-11-12 00:15:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:35,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990407661] [2023-11-12 00:15:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:35,085 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 [2023-11-12 00:15:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:35,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:35,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:15:35,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:35,206 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-12 00:15:35,207 INFO L351 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-12 00:15:35,231 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:15:35,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-12 00:15:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:35,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:35,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990407661] [2023-11-12 00:15:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990407661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:35,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:35,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951522095] [2023-11-12 00:15:35,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:35,265 INFO L87 Difference]: Start difference. First operand 161 states and 387 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:35,440 INFO L93 Difference]: Finished difference Result 125 states and 280 transitions. [2023-11-12 00:15:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:35,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:15:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:35,442 INFO L225 Difference]: With dead ends: 125 [2023-11-12 00:15:35,443 INFO L226 Difference]: Without dead ends: 125 [2023-11-12 00:15:35,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:35,444 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:35,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-12 00:15:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-12 00:15:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 93 states have (on average 3.010752688172043) internal successors, (280), 124 states have internal predecessors, (280), 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) [2023-11-12 00:15:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 280 transitions. [2023-11-12 00:15:35,454 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 280 transitions. Word has length 2 [2023-11-12 00:15:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:35,455 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 280 transitions. [2023-11-12 00:15:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 280 transitions. [2023-11-12 00:15:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:15:35,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:35,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:15:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:35,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:35,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash 730629, now seen corresponding path program 1 times [2023-11-12 00:15:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:35,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311919233] [2023-11-12 00:15:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:35,669 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 [2023-11-12 00:15:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:35,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:35,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-12 00:15:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:35,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:15:35,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:35,755 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:35,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:35,767 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:35,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:35,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:35,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:35,818 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:35,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:35,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:36,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311919233] [2023-11-12 00:15:36,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311919233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:36,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787234180] [2023-11-12 00:15:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:36,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:15:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:15:36,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:15:36,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-12 00:15:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:36,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:15:36,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:36,311 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,323 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,333 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:36,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787234180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105151738] [2023-11-12 00:15:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:36,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:36,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:36,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:36,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:15:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:36,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:15:36,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:36,626 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:36,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,683 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,693 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:36,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105151738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:36,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:15:36,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2023-11-12 00:15:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197168704] [2023-11-12 00:15:36,945 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:15:36,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:15:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:15:36,946 INFO L87 Difference]: Start difference. First operand 125 states and 280 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:37,824 INFO L93 Difference]: Finished difference Result 128 states and 286 transitions. [2023-11-12 00:15:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:15:37,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 00:15:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:37,827 INFO L225 Difference]: With dead ends: 128 [2023-11-12 00:15:37,827 INFO L226 Difference]: Without dead ends: 128 [2023-11-12 00:15:37,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:15:37,828 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:37,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:15:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-12 00:15:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-12 00:15:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 127 states have internal predecessors, (286), 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) [2023-11-12 00:15:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2023-11-12 00:15:37,838 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 3 [2023-11-12 00:15:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2023-11-12 00:15:37,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2023-11-12 00:15:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:15:37,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:37,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:15:37,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 00:15:38,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:38,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt [2023-11-12 00:15:38,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:38,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 22680253, now seen corresponding path program 1 times [2023-11-12 00:15:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021154124] [2023-11-12 00:15:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:38,447 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 [2023-11-12 00:15:38,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:38,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:38,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-12 00:15:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:38,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:15:38,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:38,541 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:15:38,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-12 00:15:38,572 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:15:38,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 00:15:38,592 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:15:38,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-12 00:15:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:38,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:38,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:38,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021154124] [2023-11-12 00:15:38,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021154124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:38,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:38,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:38,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364022] [2023-11-12 00:15:38,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:38,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:38,653 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:38,803 INFO L93 Difference]: Finished difference Result 116 states and 262 transitions. [2023-11-12 00:15:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:15:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:38,805 INFO L225 Difference]: With dead ends: 116 [2023-11-12 00:15:38,805 INFO L226 Difference]: Without dead ends: 116 [2023-11-12 00:15:38,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:38,807 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:38,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:15:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-12 00:15:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-12 00:15:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 2.847826086956522) internal successors, (262), 115 states have internal predecessors, (262), 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) [2023-11-12 00:15:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 262 transitions. [2023-11-12 00:15:38,814 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 262 transitions. Word has length 4 [2023-11-12 00:15:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:38,815 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 262 transitions. [2023-11-12 00:15:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 262 transitions. [2023-11-12 00:15:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:15:38,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:38,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:15:38,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:39,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:39,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash 22680255, now seen corresponding path program 1 times [2023-11-12 00:15:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604397607] [2023-11-12 00:15:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:39,028 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 [2023-11-12 00:15:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:39,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:39,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-12 00:15:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:39,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:15:39,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-12 00:15:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,162 INFO L351 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 10 treesize of output 8 [2023-11-12 00:15:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:39,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:39,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604397607] [2023-11-12 00:15:39,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604397607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:39,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:39,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:39,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946600532] [2023-11-12 00:15:39,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:39,222 INFO L87 Difference]: Start difference. First operand 116 states and 262 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:39,355 INFO L93 Difference]: Finished difference Result 104 states and 238 transitions. [2023-11-12 00:15:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:15:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:39,357 INFO L225 Difference]: With dead ends: 104 [2023-11-12 00:15:39,357 INFO L226 Difference]: Without dead ends: 104 [2023-11-12 00:15:39,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:39,358 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:39,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:15:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-12 00:15:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-12 00:15:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 2.7045454545454546) internal successors, (238), 103 states have internal predecessors, (238), 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) [2023-11-12 00:15:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 238 transitions. [2023-11-12 00:15:39,365 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 238 transitions. Word has length 4 [2023-11-12 00:15:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:39,365 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 238 transitions. [2023-11-12 00:15:39,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 238 transitions. [2023-11-12 00:15:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:15:39,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:39,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:15:39,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:39,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:39,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash 703084761, now seen corresponding path program 1 times [2023-11-12 00:15:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:39,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132883360] [2023-11-12 00:15:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:39,577 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 [2023-11-12 00:15:39,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:39,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:39,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-12 00:15:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:39,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:15:39,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:39,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:15:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,663 INFO L351 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 1 [2023-11-12 00:15:39,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,668 INFO L351 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 1 [2023-11-12 00:15:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-12 00:15:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:39,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 00:15:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:39,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:39,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132883360] [2023-11-12 00:15:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132883360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:39,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:39,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410753903] [2023-11-12 00:15:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:15:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:15:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:39,720 INFO L87 Difference]: Start difference. First operand 104 states and 238 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-12 00:15:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:39,894 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2023-11-12 00:15:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:15:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:15:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:39,895 INFO L225 Difference]: With dead ends: 68 [2023-11-12 00:15:39,895 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 00:15:39,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:39,896 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:39,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 00:15:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-12 00:15:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 67 states have internal predecessors, (151), 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) [2023-11-12 00:15:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 151 transitions. [2023-11-12 00:15:39,901 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 151 transitions. Word has length 5 [2023-11-12 00:15:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:39,902 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 151 transitions. [2023-11-12 00:15:39,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-12 00:15:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 151 transitions. [2023-11-12 00:15:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:15:39,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:39,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:15:39,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:40,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:40,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:40,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 703084762, now seen corresponding path program 1 times [2023-11-12 00:15:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57420195] [2023-11-12 00:15:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:40,113 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 [2023-11-12 00:15:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:40,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-12 00:15:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:40,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:15:40,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:40,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:40,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57420195] [2023-11-12 00:15:40,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57420195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:40,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753008364] [2023-11-12 00:15:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:40,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:15:40,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:15:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:40,240 INFO L87 Difference]: Start difference. First operand 68 states and 151 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-12 00:15:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:40,507 INFO L93 Difference]: Finished difference Result 81 states and 170 transitions. [2023-11-12 00:15:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:15:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:15:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:40,509 INFO L225 Difference]: With dead ends: 81 [2023-11-12 00:15:40,509 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 00:15:40,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:40,510 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:40,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:15:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 00:15:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-12 00:15:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 2.459016393442623) internal successors, (150), 67 states have internal predecessors, (150), 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) [2023-11-12 00:15:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 150 transitions. [2023-11-12 00:15:40,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 150 transitions. Word has length 5 [2023-11-12 00:15:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:40,515 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 150 transitions. [2023-11-12 00:15:40,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-12 00:15:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 150 transitions. [2023-11-12 00:15:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:15:40,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:40,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:15:40,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:40,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:40,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash 293762292, now seen corresponding path program 1 times [2023-11-12 00:15:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925027426] [2023-11-12 00:15:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:40,717 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 [2023-11-12 00:15:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:40,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:40,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:40,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:15:40,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:40,825 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:40,837 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:40,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:40,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:40,858 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:40,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:40,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:41,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:41,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:41,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925027426] [2023-11-12 00:15:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925027426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:41,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247911877] [2023-11-12 00:15:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:41,728 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:15:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:15:41,740 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:15:41,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-11-12 00:15:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:41,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:15:41,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:41,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-12 00:15:41,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:41,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:41,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:41,962 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:41,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:41,984 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:42,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247911877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970289714] [2023-11-12 00:15:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:42,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:42,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:42,480 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:42,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 00:15:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:42,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:15:42,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:42,599 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:42,611 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:42,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:42,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:42,666 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:42,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:42,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:43,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970289714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:43,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:15:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2023-11-12 00:15:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664443033] [2023-11-12 00:15:43,075 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:43,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:15:43,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:15:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:15:43,076 INFO L87 Difference]: Start difference. First operand 68 states and 150 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2023-11-12 00:15:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:44,451 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2023-11-12 00:15:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:15:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 [2023-11-12 00:15:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:44,454 INFO L225 Difference]: With dead ends: 134 [2023-11-12 00:15:44,454 INFO L226 Difference]: Without dead ends: 134 [2023-11-12 00:15:44,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:15:44,455 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:44,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:15:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-12 00:15:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2023-11-12 00:15:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 2.465909090909091) internal successors, (217), 94 states have internal predecessors, (217), 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) [2023-11-12 00:15:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 217 transitions. [2023-11-12 00:15:44,461 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 217 transitions. Word has length 6 [2023-11-12 00:15:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:44,461 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 217 transitions. [2023-11-12 00:15:44,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2023-11-12 00:15:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 217 transitions. [2023-11-12 00:15:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:15:44,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:44,462 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2023-11-12 00:15:44,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 [2023-11-12 00:15:44,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:44,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:45,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:45,074 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:45,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 292861279, now seen corresponding path program 2 times [2023-11-12 00:15:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:45,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838095735] [2023-11-12 00:15:45,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:15:45,075 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 [2023-11-12 00:15:45,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:45,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:45,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-12 00:15:45,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:15:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:45,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:15:45,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:45,201 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:45,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:45,236 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:45,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:45,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:45,267 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:45,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:46,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838095735] [2023-11-12 00:15:46,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838095735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1276136467] [2023-11-12 00:15:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:15:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:15:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:15:46,172 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:15:46,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-12 00:15:46,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:15:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:46,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:15:46,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:46,392 INFO L351 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 13 treesize of output 7 [2023-11-12 00:15:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:46,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:46,427 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:46,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:46,447 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:46,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:46,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1276136467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857334015] [2023-11-12 00:15:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:15:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:47,511 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:47,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 00:15:47,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:15:47,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:47,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:15:47,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:47,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:15:47,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:47,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:47,665 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:47,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:47,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:47,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:47,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857334015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:48,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:15:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2023-11-12 00:15:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562976466] [2023-11-12 00:15:48,014 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:48,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:15:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:15:48,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:15:48,015 INFO L87 Difference]: Start difference. First operand 95 states and 217 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2023-11-12 00:15:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:50,970 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2023-11-12 00:15:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:15:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) Word has length 6 [2023-11-12 00:15:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:50,973 INFO L225 Difference]: With dead ends: 101 [2023-11-12 00:15:50,973 INFO L226 Difference]: Without dead ends: 101 [2023-11-12 00:15:50,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:15:50,974 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:50,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 00:15:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-12 00:15:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-12 00:15:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 2.4361702127659575) internal successors, (229), 100 states have internal predecessors, (229), 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) [2023-11-12 00:15:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 229 transitions. [2023-11-12 00:15:50,981 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 229 transitions. Word has length 6 [2023-11-12 00:15:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:50,981 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 229 transitions. [2023-11-12 00:15:50,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2023-11-12 00:15:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 229 transitions. [2023-11-12 00:15:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:15:50,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:50,982 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-12 00:15:50,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:51,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:51,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:51,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:51,594 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1554214746, now seen corresponding path program 2 times [2023-11-12 00:15:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997647046] [2023-11-12 00:15:51,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:15:51,596 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 [2023-11-12 00:15:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:51,597 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-12 00:15:51,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 00:15:51,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:51,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:15:51,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:51,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:15:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:51,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:51,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-12 00:15:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:51,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:51,772 INFO L351 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 8 treesize of output 1 [2023-11-12 00:15:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:15:51,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 00:15:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:15:51,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:51,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:15:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997647046] [2023-11-12 00:15:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997647046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:51,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:51,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636267862] [2023-11-12 00:15:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:51,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:15:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:15:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:15:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:51,913 INFO L87 Difference]: Start difference. First operand 101 states and 229 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-11-12 00:15:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:52,131 INFO L93 Difference]: Finished difference Result 73 states and 162 transitions. [2023-11-12 00:15:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:15:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 9 [2023-11-12 00:15:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:52,133 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:15:52,133 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 00:15:52,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:52,134 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:52,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 00:15:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2023-11-12 00:15:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 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) [2023-11-12 00:15:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2023-11-12 00:15:52,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 9 [2023-11-12 00:15:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:52,138 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2023-11-12 00:15:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-11-12 00:15:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2023-11-12 00:15:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:15:52,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:52,139 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2023-11-12 00:15:52,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:52,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:15:52,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-12 00:15:52,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash 793301919, now seen corresponding path program 3 times [2023-11-12 00:15:52,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:15:52,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174441313] [2023-11-12 00:15:52,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:52,350 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 [2023-11-12 00:15:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:15:52,351 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -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) [2023-11-12 00:15:52,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b236b3-1e6f-4c03-a7a9-cb66d694e193/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-12 00:15:52,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:15:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:52,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:15:52,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:52,612 INFO L351 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 13 treesize of output 7