./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:54:55,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:54:55,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:54:55,438 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:54:55,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:54:55,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:54:55,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:54:55,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:54:55,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:54:55,487 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:54:55,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:54:55,489 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:54:55,490 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:54:55,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:54:55,492 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:54:55,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:54:55,493 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:54:55,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:54:55,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:54:55,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:54:55,495 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:54:55,496 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:54:55,496 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:54:55,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:54:55,497 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:54:55,498 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:54:55,498 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:54:55,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:54:55,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:54:55,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:54:55,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:54:55,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:54:55,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:54:55,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:54:55,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:54:55,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:54:55,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:54:55,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:54:55,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:54:55,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:54:55,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:54:55,505 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-24 21:54:55,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:54:55,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:54:55,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:54:55,861 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:54:55,862 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:54:55,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-24 21:54:58,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:54:59,225 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:54:59,226 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-24 21:54:59,238 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/1f48fa0f7/ee27d5f77fbf42c7beb76ded24e6db4f/FLAG07cb50d3e [2023-11-24 21:54:59,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/1f48fa0f7/ee27d5f77fbf42c7beb76ded24e6db4f [2023-11-24 21:54:59,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:54:59,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:54:59,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:59,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:54:59,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:54:59,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:59" (1/1) ... [2023-11-24 21:54:59,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23620084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:59, skipping insertion in model container [2023-11-24 21:54:59,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:54:59" (1/1) ... [2023-11-24 21:54:59,314 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:54:59,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:54:59,597 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) [2023-11-24 21:54:59,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e7fdf85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:54:59, skipping insertion in model container [2023-11-24 21:54:59,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:54:59,598 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:54:59,600 INFO L158 Benchmark]: Toolchain (without parser) took 334.12ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 110.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:54:59,601 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 167.8MB. Free memory was 111.3MB in the beginning and 111.2MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:54:59,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.78ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 110.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:54:59,603 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 167.8MB. Free memory was 111.3MB in the beginning and 111.2MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.78ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 110.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:02,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:02,396 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:55:02,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:02,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:02,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:02,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:02,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:02,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:02,483 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:02,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:02,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:02,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:02,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:02,487 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:02,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:02,488 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:02,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:02,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:02,490 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:02,490 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:02,491 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:02,491 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:02,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:02,492 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:02,493 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:55:02,493 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:55:02,494 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:02,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:02,494 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:02,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:02,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:02,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:02,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:02,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:02,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:02,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:02,499 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:55:02,499 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:55:02,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:02,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:02,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:02,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:02,501 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:55:02,501 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-24 21:55:02,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:03,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:03,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:03,020 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:03,021 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:03,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-24 21:55:06,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:06,676 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:06,677 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-24 21:55:06,686 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/30090ce7f/f29ee02a1b1b45608c6f7ebb9bbe70ad/FLAG8a4ce4bc5 [2023-11-24 21:55:06,700 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/data/30090ce7f/f29ee02a1b1b45608c6f7ebb9bbe70ad [2023-11-24 21:55:06,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:06,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:06,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:06,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:06,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:06,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:06" (1/1) ... [2023-11-24 21:55:06,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3bad11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:06, skipping insertion in model container [2023-11-24 21:55:06,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:06" (1/1) ... [2023-11-24 21:55:06,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:06,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:07,022 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:55:07,038 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:07,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:07,079 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:07,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:07,128 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:55:07,128 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:55:07,142 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:07,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07 WrapperNode [2023-11-24 21:55:07,143 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:07,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:07,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:07,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:07,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,211 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 126 [2023-11-24 21:55:07,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:07,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:07,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:07,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:07,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,234 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,262 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 6, 2, 2, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-24 21:55:07,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:07,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:07,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:07,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:07,353 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (1/1) ... [2023-11-24 21:55:07,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:07,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:07,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:55:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:55:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:55:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:55:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-24 21:55:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:55:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:55:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:55:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:55:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:55:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-24 21:55:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:55:07,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:55:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:55:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:55:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:55:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:55:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:55:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:55:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:55:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:07,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:55:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:55:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:55:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:55:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:55:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-24 21:55:07,473 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:55:07,644 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:07,647 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:08,429 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:08,793 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:08,793 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 21:55:08,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:08 BoogieIcfgContainer [2023-11-24 21:55:08,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:08,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:08,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:08,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:08,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:06" (1/3) ... [2023-11-24 21:55:08,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62405c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:08, skipping insertion in model container [2023-11-24 21:55:08,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:07" (2/3) ... [2023-11-24 21:55:08,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62405c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:08, skipping insertion in model container [2023-11-24 21:55:08,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:08" (3/3) ... [2023-11-24 21:55:08,808 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-24 21:55:08,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:08,831 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-24 21:55:08,831 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:55:08,953 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 21:55:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 171 flow [2023-11-24 21:55:09,044 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-11-24 21:55:09,044 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:55:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 6/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 153 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-24 21:55:09,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 171 flow [2023-11-24 21:55:09,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 71 transitions, 160 flow [2023-11-24 21:55:09,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:09,075 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=PETRI_NET, 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;@5d3cf157, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:09,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-11-24 21:55:09,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:55:09,081 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:55:09,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:09,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:09,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:55:09,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:09,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 509839, now seen corresponding path program 1 times [2023-11-24 21:55:09,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:09,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368270127] [2023-11-24 21:55:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:09,107 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 [2023-11-24 21:55:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:09,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:09,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:09,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:55:09,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:09,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:55:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,408 INFO L378 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 [2023-11-24 21:55:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,442 INFO L378 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 [2023-11-24 21:55:09,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,458 INFO L378 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 [2023-11-24 21:55:09,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,485 INFO L378 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 [2023-11-24 21:55:09,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,523 INFO L378 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 [2023-11-24 21:55:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,535 INFO L378 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 [2023-11-24 21:55:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,557 INFO L378 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 [2023-11-24 21:55:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,570 INFO L378 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 [2023-11-24 21:55:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,632 INFO L378 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 [2023-11-24 21:55:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,672 INFO L378 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 [2023-11-24 21:55:09,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,687 INFO L378 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 [2023-11-24 21:55:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:09,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,716 INFO L378 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 [2023-11-24 21:55:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,761 INFO L378 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 [2023-11-24 21:55:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,788 INFO L378 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 [2023-11-24 21:55:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,828 INFO L378 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 [2023-11-24 21:55:09,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,844 INFO L378 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 [2023-11-24 21:55:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:55:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:09,946 INFO L378 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 [2023-11-24 21:55:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:09,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:09,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368270127] [2023-11-24 21:55:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368270127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:09,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:09,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858303864] [2023-11-24 21:55:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:10,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:10,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2023-11-24 21:55:10,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:10,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:10,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:10,755 INFO L124 PetriNetUnfolderBase]: 984/1807 cut-off events. [2023-11-24 21:55:10,755 INFO L125 PetriNetUnfolderBase]: For 193/195 co-relation queries the response was YES. [2023-11-24 21:55:10,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 1807 events. 984/1807 cut-off events. For 193/195 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10975 event pairs, 706 based on Foata normal form. 1/1307 useless extension candidates. Maximal degree in co-relation 2772. Up to 1325 conditions per place. [2023-11-24 21:55:10,783 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 32 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-24 21:55:10,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 220 flow [2023-11-24 21:55:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-24 21:55:10,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2023-11-24 21:55:10,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-24 21:55:10,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-24 21:55:10,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:10,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-24 21:55:10,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2023-11-24 21:55:10,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:10,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:10,818 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 160 flow. Second operand 3 states and 148 transitions. [2023-11-24 21:55:10,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 220 flow [2023-11-24 21:55:10,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:55:10,829 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 144 flow [2023-11-24 21:55:10,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-11-24 21:55:10,836 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2023-11-24 21:55:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 144 flow [2023-11-24 21:55:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2023-11-24 21:55:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:10,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:55:10,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:11,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:11,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash 509840, now seen corresponding path program 1 times [2023-11-24 21:55:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:11,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107831040] [2023-11-24 21:55:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:11,044 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 [2023-11-24 21:55:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:11,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:11,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:11,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:55:11,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:11,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:55:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,264 INFO L378 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 [2023-11-24 21:55:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,313 INFO L378 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 [2023-11-24 21:55:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,351 INFO L378 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 [2023-11-24 21:55:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,381 INFO L378 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 [2023-11-24 21:55:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,411 INFO L378 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 [2023-11-24 21:55:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,436 INFO L378 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 [2023-11-24 21:55:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,465 INFO L378 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 [2023-11-24 21:55:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,480 INFO L378 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 [2023-11-24 21:55:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,508 INFO L378 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 [2023-11-24 21:55:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,533 INFO L378 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 [2023-11-24 21:55:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,553 INFO L378 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 [2023-11-24 21:55:11,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,578 INFO L378 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 [2023-11-24 21:55:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,615 INFO L378 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 [2023-11-24 21:55:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,635 INFO L378 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 [2023-11-24 21:55:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,655 INFO L378 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 [2023-11-24 21:55:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,680 INFO L378 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 [2023-11-24 21:55:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:55:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:11,761 INFO L378 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 [2023-11-24 21:55:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:11,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:11,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:11,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107831040] [2023-11-24 21:55:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107831040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:11,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:11,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704844002] [2023-11-24 21:55:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:12,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:12,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 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) [2023-11-24 21:55:12,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:12,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:12,903 INFO L124 PetriNetUnfolderBase]: 986/1813 cut-off events. [2023-11-24 21:55:12,903 INFO L125 PetriNetUnfolderBase]: For 55/57 co-relation queries the response was YES. [2023-11-24 21:55:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1813 events. 986/1813 cut-off events. For 55/57 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10963 event pairs, 706 based on Foata normal form. 0/1310 useless extension candidates. Maximal degree in co-relation 3149. Up to 1334 conditions per place. [2023-11-24 21:55:12,927 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2023-11-24 21:55:12,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 242 flow [2023-11-24 21:55:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:55:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:55:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2023-11-24 21:55:12,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2023-11-24 21:55:12,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 192 transitions. [2023-11-24 21:55:12,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 192 transitions. [2023-11-24 21:55:12,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:12,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 192 transitions. [2023-11-24 21:55:12,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-24 21:55:12,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2023-11-24 21:55:12,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2023-11-24 21:55:12,946 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 144 flow. Second operand 4 states and 192 transitions. [2023-11-24 21:55:12,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 242 flow [2023-11-24 21:55:12,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:12,951 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 196 flow [2023-11-24 21:55:12,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-11-24 21:55:12,952 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-11-24 21:55:12,953 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 196 flow [2023-11-24 21:55:12,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 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) [2023-11-24 21:55:12,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:12,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:55:12,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-24 21:55:13,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:13,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:13,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 15805991, now seen corresponding path program 1 times [2023-11-24 21:55:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:13,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521103355] [2023-11-24 21:55:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:13,161 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 [2023-11-24 21:55:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:13,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:13,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:13,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:55:13,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:13,389 INFO L349 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-11-24 21:55:13,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 29 [2023-11-24 21:55:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:13,508 INFO L349 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-24 21:55:13,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-24 21:55:13,691 INFO L349 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-11-24 21:55:13,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 75 [2023-11-24 21:55:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:14,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:14,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:14,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521103355] [2023-11-24 21:55:14,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521103355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:14,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124010969] [2023-11-24 21:55:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:14,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:14,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 21:55:14,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:14,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:14,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:14,921 INFO L124 PetriNetUnfolderBase]: 986/1788 cut-off events. [2023-11-24 21:55:14,921 INFO L125 PetriNetUnfolderBase]: For 56/58 co-relation queries the response was YES. [2023-11-24 21:55:14,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1788 events. 986/1788 cut-off events. For 56/58 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10631 event pairs, 706 based on Foata normal form. 145/1458 useless extension candidates. Maximal degree in co-relation 3135. Up to 1336 conditions per place. [2023-11-24 21:55:14,941 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 39 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-24 21:55:14,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 272 flow [2023-11-24 21:55:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:55:14,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-24 21:55:14,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:55:14,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:55:14,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:14,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:55:14,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-24 21:55:14,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:14,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:14,948 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 196 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:55:14,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 272 flow [2023-11-24 21:55:14,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:55:14,951 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 194 flow [2023-11-24 21:55:14,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-24 21:55:14,953 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-11-24 21:55:14,953 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 194 flow [2023-11-24 21:55:14,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 21:55:14,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:14,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:55:14,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:15,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:15,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:15,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash 15805992, now seen corresponding path program 1 times [2023-11-24 21:55:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411917087] [2023-11-24 21:55:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:15,164 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 [2023-11-24 21:55:15,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:15,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:15,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:15,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:55:15,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,337 INFO L378 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 [2023-11-24 21:55:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:55:15,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,413 INFO L378 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 [2023-11-24 21:55:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:55:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:15,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:55:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:15,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:15,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:15,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411917087] [2023-11-24 21:55:15,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411917087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:15,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:15,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:15,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191357975] [2023-11-24 21:55:15,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:15,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:15,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:15,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2023-11-24 21:55:15,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:15,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:15,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:16,273 INFO L124 PetriNetUnfolderBase]: 986/1763 cut-off events. [2023-11-24 21:55:16,274 INFO L125 PetriNetUnfolderBase]: For 56/58 co-relation queries the response was YES. [2023-11-24 21:55:16,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3156 conditions, 1763 events. 986/1763 cut-off events. For 56/58 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10274 event pairs, 706 based on Foata normal form. 145/1458 useless extension candidates. Maximal degree in co-relation 3145. Up to 1336 conditions per place. [2023-11-24 21:55:16,293 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 39 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-24 21:55:16,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 270 flow [2023-11-24 21:55:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:55:16,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-24 21:55:16,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:55:16,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:55:16,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:16,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:55:16,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-24 21:55:16,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:16,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:16,303 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 194 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:55:16,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 270 flow [2023-11-24 21:55:16,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:16,310 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 191 flow [2023-11-24 21:55:16,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-11-24 21:55:16,312 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -5 predicate places. [2023-11-24 21:55:16,313 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 191 flow [2023-11-24 21:55:16,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2023-11-24 21:55:16,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:16,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:55:16,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 21:55:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:16,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:16,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 489972126, now seen corresponding path program 1 times [2023-11-24 21:55:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:16,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517525602] [2023-11-24 21:55:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:16,530 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 [2023-11-24 21:55:16,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:16,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:16,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:55:16,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:16,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:55:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,649 INFO L378 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 [2023-11-24 21:55:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,662 INFO L378 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 [2023-11-24 21:55:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,688 INFO L378 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 [2023-11-24 21:55:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,701 INFO L378 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 [2023-11-24 21:55:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:16,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,743 INFO L378 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 [2023-11-24 21:55:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,759 INFO L378 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 [2023-11-24 21:55:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,777 INFO L378 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 [2023-11-24 21:55:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,804 INFO L378 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 [2023-11-24 21:55:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,833 INFO L378 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 [2023-11-24 21:55:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:55:16,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,902 INFO L378 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 [2023-11-24 21:55:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,915 INFO L378 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 [2023-11-24 21:55:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,940 INFO L378 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 [2023-11-24 21:55:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,964 INFO L378 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 [2023-11-24 21:55:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:16,992 INFO L378 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 [2023-11-24 21:55:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:17,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:17,016 INFO L378 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 [2023-11-24 21:55:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:17,044 INFO L378 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 [2023-11-24 21:55:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:17,058 INFO L378 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 [2023-11-24 21:55:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:17,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:17,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517525602] [2023-11-24 21:55:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517525602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:17,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:55:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:55:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544169596] [2023-11-24 21:55:17,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:55:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:55:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:55:18,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:18,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 191 flow. Second operand has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2023-11-24 21:55:18,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:18,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:18,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:21,502 INFO L124 PetriNetUnfolderBase]: 992/1781 cut-off events. [2023-11-24 21:55:21,502 INFO L125 PetriNetUnfolderBase]: For 59/61 co-relation queries the response was YES. [2023-11-24 21:55:21,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 1781 events. 992/1781 cut-off events. For 59/61 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10350 event pairs, 706 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 3204. Up to 1337 conditions per place. [2023-11-24 21:55:21,523 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2023-11-24 21:55:21,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 389 flow [2023-11-24 21:55:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:55:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:55:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 436 transitions. [2023-11-24 21:55:21,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813333333333334 [2023-11-24 21:55:21,528 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 436 transitions. [2023-11-24 21:55:21,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 436 transitions. [2023-11-24 21:55:21,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:21,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 436 transitions. [2023-11-24 21:55:21,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 43.6) internal successors, (436), 10 states have internal predecessors, (436), 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) [2023-11-24 21:55:21,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2023-11-24 21:55:21,534 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2023-11-24 21:55:21,534 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 191 flow. Second operand 10 states and 436 transitions. [2023-11-24 21:55:21,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 389 flow [2023-11-24 21:55:21,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:21,538 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 352 flow [2023-11-24 21:55:21,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2023-11-24 21:55:21,540 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-11-24 21:55:21,540 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 352 flow [2023-11-24 21:55:21,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2023-11-24 21:55:21,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:21,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:21,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:21,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:21,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596463, now seen corresponding path program 1 times [2023-11-24 21:55:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363365910] [2023-11-24 21:55:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:21,750 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 [2023-11-24 21:55:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:21,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:21,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 21:55:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:21,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:55:21,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:21,935 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:55:21,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-24 21:55:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:21,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:55:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,014 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:55:22,015 INFO L378 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 24 treesize of output 15 [2023-11-24 21:55:22,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:55:22,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,094 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:55:22,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-24 21:55:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 21:55:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,188 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:55:22,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-24 21:55:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:22,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-24 21:55:22,288 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:55:22,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:55:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:22,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:22,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:22,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363365910] [2023-11-24 21:55:22,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363365910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:22,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:22,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550585349] [2023-11-24 21:55:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:22,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:22,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-24 21:55:22,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:22,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:22,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:22,887 INFO L124 PetriNetUnfolderBase]: 992/1771 cut-off events. [2023-11-24 21:55:22,887 INFO L125 PetriNetUnfolderBase]: For 80/82 co-relation queries the response was YES. [2023-11-24 21:55:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3249 conditions, 1771 events. 992/1771 cut-off events. For 80/82 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10256 event pairs, 706 based on Foata normal form. 43/1374 useless extension candidates. Maximal degree in co-relation 3233. Up to 1354 conditions per place. [2023-11-24 21:55:22,904 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 57 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-24 21:55:22,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 464 flow [2023-11-24 21:55:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:55:22,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-24 21:55:22,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:55:22,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:55:22,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:22,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:55:22,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-24 21:55:22,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:22,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:22,909 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 352 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:55:22,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 464 flow [2023-11-24 21:55:22,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 85 transitions, 400 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-24 21:55:22,919 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 286 flow [2023-11-24 21:55:22,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-11-24 21:55:22,923 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-11-24 21:55:22,924 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 286 flow [2023-11-24 21:55:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-24 21:55:22,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:22,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:22,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:23,127 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:23,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596462, now seen corresponding path program 1 times [2023-11-24 21:55:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556216000] [2023-11-24 21:55:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:23,128 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 [2023-11-24 21:55:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:23,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:23,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 21:55:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:23,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:55:23,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:55:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:55:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,348 INFO L378 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 [2023-11-24 21:55:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:55:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,437 INFO L378 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 [2023-11-24 21:55:23,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,496 INFO L378 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 [2023-11-24 21:55:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,526 INFO L378 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 [2023-11-24 21:55:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,569 INFO L378 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 [2023-11-24 21:55:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:23,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:55:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:23,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:23,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556216000] [2023-11-24 21:55:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556216000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:23,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:23,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606459913] [2023-11-24 21:55:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:23,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:23,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2023-11-24 21:55:23,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:23,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:23,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:24,301 INFO L124 PetriNetUnfolderBase]: 992/1761 cut-off events. [2023-11-24 21:55:24,301 INFO L125 PetriNetUnfolderBase]: For 68/70 co-relation queries the response was YES. [2023-11-24 21:55:24,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3208 conditions, 1761 events. 992/1761 cut-off events. For 68/70 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10133 event pairs, 706 based on Foata normal form. 43/1373 useless extension candidates. Maximal degree in co-relation 3193. Up to 1354 conditions per place. [2023-11-24 21:55:24,321 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 57 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-11-24 21:55:24,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 398 flow [2023-11-24 21:55:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:55:24,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-24 21:55:24,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:55:24,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:55:24,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:24,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:55:24,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-24 21:55:24,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:24,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:24,326 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 286 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:55:24,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 398 flow [2023-11-24 21:55:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:24,330 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 283 flow [2023-11-24 21:55:24,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2023-11-24 21:55:24,331 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2023-11-24 21:55:24,331 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 283 flow [2023-11-24 21:55:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2023-11-24 21:55:24,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:24,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:24,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:24,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:24,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1412815894, now seen corresponding path program 1 times [2023-11-24 21:55:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:24,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637152954] [2023-11-24 21:55:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:24,536 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 [2023-11-24 21:55:24,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:24,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:24,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:24,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:55:24,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:24,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:24,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637152954] [2023-11-24 21:55:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637152954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:24,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:55:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011392885] [2023-11-24 21:55:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:55:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:55:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:55:24,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-24 21:55:24,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2023-11-24 21:55:24,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:24,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-24 21:55:24,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:25,896 INFO L124 PetriNetUnfolderBase]: 2173/3820 cut-off events. [2023-11-24 21:55:25,897 INFO L125 PetriNetUnfolderBase]: For 123/127 co-relation queries the response was YES. [2023-11-24 21:55:25,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 3820 events. 2173/3820 cut-off events. For 123/127 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25163 event pairs, 1412 based on Foata normal form. 1/2774 useless extension candidates. Maximal degree in co-relation 6928. Up to 1734 conditions per place. [2023-11-24 21:55:25,934 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 93 selfloop transitions, 12 changer transitions 0/129 dead transitions. [2023-11-24 21:55:25,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 596 flow [2023-11-24 21:55:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:55:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:55:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2023-11-24 21:55:25,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044444444444444 [2023-11-24 21:55:25,938 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 317 transitions. [2023-11-24 21:55:25,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 317 transitions. [2023-11-24 21:55:25,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:25,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 317 transitions. [2023-11-24 21:55:25,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 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) [2023-11-24 21:55:25,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 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) [2023-11-24 21:55:25,942 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 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) [2023-11-24 21:55:25,943 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 283 flow. Second operand 6 states and 317 transitions. [2023-11-24 21:55:25,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 596 flow [2023-11-24 21:55:25,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 595 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:25,948 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 331 flow [2023-11-24 21:55:25,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2023-11-24 21:55:25,949 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2023-11-24 21:55:25,949 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 331 flow [2023-11-24 21:55:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2023-11-24 21:55:25,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:25,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:25,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:26,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:26,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:26,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash -538752184, now seen corresponding path program 1 times [2023-11-24 21:55:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:26,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636415086] [2023-11-24 21:55:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:26,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:26,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:26,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:26,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:26,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:55:26,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,334 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:55:26,334 INFO L378 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 24 treesize of output 15 [2023-11-24 21:55:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,350 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:55:26,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,362 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:55:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,410 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-24 21:55:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,442 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,443 INFO L378 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-24 21:55:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,469 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:55:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,485 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:55:26,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,512 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:55:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,525 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:55:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,543 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:55:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,570 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:55:26,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:26,582 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:55:26,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:55:26,607 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:55:26,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:55:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:26,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:26,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636415086] [2023-11-24 21:55:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636415086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:26,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870683681] [2023-11-24 21:55:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:26,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:26,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2023-11-24 21:55:26,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-11-24 21:55:26,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:26,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2023-11-24 21:55:26,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:27,319 INFO L124 PetriNetUnfolderBase]: 1961/3510 cut-off events. [2023-11-24 21:55:27,319 INFO L125 PetriNetUnfolderBase]: For 1062/1150 co-relation queries the response was YES. [2023-11-24 21:55:27,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7130 conditions, 3510 events. 1961/3510 cut-off events. For 1062/1150 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22890 event pairs, 1496 based on Foata normal form. 0/2687 useless extension candidates. Maximal degree in co-relation 7110. Up to 2724 conditions per place. [2023-11-24 21:55:27,359 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 62 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-11-24 21:55:27,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 453 flow [2023-11-24 21:55:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 21:55:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2023-11-24 21:55:27,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 21:55:27,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 21:55:27,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:27,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 21:55:27,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-24 21:55:27,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:27,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:27,365 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 331 flow. Second operand 3 states and 143 transitions. [2023-11-24 21:55:27,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 453 flow [2023-11-24 21:55:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:27,371 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 318 flow [2023-11-24 21:55:27,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-24 21:55:27,373 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2023-11-24 21:55:27,373 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 318 flow [2023-11-24 21:55:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-11-24 21:55:27,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:27,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:27,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:27,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:27,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -538752183, now seen corresponding path program 1 times [2023-11-24 21:55:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762132803] [2023-11-24 21:55:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:27,579 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 [2023-11-24 21:55:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:27,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:27,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:27,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:55:27,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:55:27,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:55:27,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,822 INFO L378 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 [2023-11-24 21:55:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,839 INFO L378 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 [2023-11-24 21:55:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,859 INFO L378 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 [2023-11-24 21:55:27,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,885 INFO L378 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 [2023-11-24 21:55:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,902 INFO L378 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 [2023-11-24 21:55:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,920 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:27,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:27,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:55:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:28,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:55:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:28,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:28,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:28,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762132803] [2023-11-24 21:55:28,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762132803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:28,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:28,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:28,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976497811] [2023-11-24 21:55:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:28,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:28,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2023-11-24 21:55:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:29,127 INFO L124 PetriNetUnfolderBase]: 1859/3331 cut-off events. [2023-11-24 21:55:29,127 INFO L125 PetriNetUnfolderBase]: For 1001/1093 co-relation queries the response was YES. [2023-11-24 21:55:29,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6736 conditions, 3331 events. 1859/3331 cut-off events. For 1001/1093 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21976 event pairs, 1412 based on Foata normal form. 58/2594 useless extension candidates. Maximal degree in co-relation 6715. Up to 2564 conditions per place. [2023-11-24 21:55:29,162 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 60 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-11-24 21:55:29,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 436 flow [2023-11-24 21:55:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:55:29,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-24 21:55:29,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:55:29,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:55:29,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:29,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:55:29,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-24 21:55:29,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:29,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-24 21:55:29,168 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 318 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:55:29,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 436 flow [2023-11-24 21:55:29,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:29,174 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 315 flow [2023-11-24 21:55:29,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-11-24 21:55:29,175 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-11-24 21:55:29,175 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 315 flow [2023-11-24 21:55:29,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2023-11-24 21:55:29,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:29,176 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:55:29,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:29,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:29,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-24 21:55:29,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1272976696, now seen corresponding path program 2 times [2023-11-24 21:55:29,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:29,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772077706] [2023-11-24 21:55:29,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:55:29,381 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 [2023-11-24 21:55:29,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:29,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:55:29,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd188590-212a-4721-a5c1-27547518361f/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:55:29,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:55:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:55:29,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:55:29,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:29,542 INFO L378 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 [2023-11-24 21:55:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,567 INFO L378 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 [2023-11-24 21:55:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,580 INFO L378 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 [2023-11-24 21:55:29,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,602 INFO L378 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 [2023-11-24 21:55:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,638 INFO L378 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 [2023-11-24 21:55:29,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,650 INFO L378 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 [2023-11-24 21:55:29,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,664 INFO L378 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 [2023-11-24 21:55:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,684 INFO L378 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 [2023-11-24 21:55:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,709 INFO L378 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 [2023-11-24 21:55:29,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,733 INFO L378 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 [2023-11-24 21:55:29,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,761 INFO L378 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 [2023-11-24 21:55:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:55:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,816 INFO L378 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 [2023-11-24 21:55:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,839 INFO L378 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 [2023-11-24 21:55:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,856 INFO L378 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 [2023-11-24 21:55:29,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,878 INFO L378 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 [2023-11-24 21:55:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,891 INFO L378 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 [2023-11-24 21:55:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,911 INFO L378 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 [2023-11-24 21:55:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:29,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:30,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:31,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:31,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772077706] [2023-11-24 21:55:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772077706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:31,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:55:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:55:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221064921] [2023-11-24 21:55:31,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:31,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:55:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:55:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:55:34,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-24 21:55:34,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 315 flow. Second operand has 14 states, 14 states have (on average 38.57142857142857) internal successors, (540), 14 states have internal predecessors, (540), 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) [2023-11-24 21:55:34,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:34,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-24 21:55:34,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:42,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:55:43,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:55:47,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:55:50,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []