./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:32:33,840 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:32:33,953 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:32:33,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:32:33,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:32:34,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:32:34,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:32:34,006 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:32:34,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:32:34,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:32:34,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:32:34,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:32:34,016 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:32:34,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:32:34,018 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:32:34,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:32:34,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:32:34,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:32:34,020 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:32:34,020 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:32:34,020 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:32:34,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:32:34,021 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:32:34,022 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:32:34,022 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:32:34,023 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:32:34,023 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:32:34,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:32:34,024 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:32:34,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:34,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:32:34,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:32:34,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:32:34,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:32:34,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:32:34,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:32:34,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:32:34,028 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:32:34,028 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_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2023-11-06 22:32:34,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:32:34,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:32:34,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:32:34,313 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:32:34,314 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:32:34,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-06 22:32:37,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:32:37,486 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:32:37,487 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-06 22:32:37,496 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/1a7d2fb55/39efee9309ad413ab7971bdbfa8f34fd/FLAG4d2044c59 [2023-11-06 22:32:37,511 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/1a7d2fb55/39efee9309ad413ab7971bdbfa8f34fd [2023-11-06 22:32:37,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:32:37,515 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:32:37,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:37,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:32:37,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:32:37,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:37" (1/1) ... [2023-11-06 22:32:37,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a34b4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:37, skipping insertion in model container [2023-11-06 22:32:37,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:37" (1/1) ... [2023-11-06 22:32:37,553 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:37,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:37,777 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) [2023-11-06 22:32:37,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29825c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:37, skipping insertion in model container [2023-11-06 22:32:37,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:37,781 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:32:37,783 INFO L158 Benchmark]: Toolchain (without parser) took 266.28ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 76.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:32:37,783 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 96.5MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:32:37,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.66ms. Allocated memory is still 130.0MB. Free memory was 86.0MB in the beginning and 76.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:32:37,786 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 96.5MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.66ms. Allocated memory is still 130.0MB. Free memory was 86.0MB in the beginning and 76.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:32:40,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:32:40,458 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:32:40,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:32:40,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:32:40,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:32:40,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:32:40,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:32:40,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:32:40,495 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:32:40,496 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:32:40,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:32:40,497 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:32:40,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:32:40,498 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:32:40,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:32:40,500 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:32:40,500 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:32:40,501 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:32:40,501 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:32:40,502 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:32:40,503 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:32:40,503 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:32:40,504 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:32:40,504 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:32:40,504 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:32:40,505 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:32:40,505 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:32:40,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:32:40,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:32:40,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:32:40,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:40,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:32:40,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:32:40,508 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:32:40,508 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:40,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:32:40,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:32:40,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:32:40,510 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:32:40,510 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:32:40,510 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_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2023-11-06 22:32:40,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:32:40,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:32:40,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:32:40,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:32:40,895 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:32:40,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-06 22:32:43,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:32:44,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:32:44,263 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-06 22:32:44,271 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/5da364941/bdd94cf129a74e3582f2e8fb6499c8a4/FLAG65a3501e3 [2023-11-06 22:32:44,285 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/data/5da364941/bdd94cf129a74e3582f2e8fb6499c8a4 [2023-11-06 22:32:44,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:32:44,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:32:44,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:44,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:32:44,301 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:32:44,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c546626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44, skipping insertion in model container [2023-11-06 22:32:44,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,329 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:44,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:44,594 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:32:44,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:44,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:44,659 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:32:44,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:44,705 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:32:44,705 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:32:44,713 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:32:44,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44 WrapperNode [2023-11-06 22:32:44,714 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:44,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:44,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:32:44,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:32:44,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,791 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 194 [2023-11-06 22:32:44,791 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:44,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:32:44,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:32:44,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:32:44,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,847 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:32:44,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:32:44,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:32:44,863 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:32:44,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (1/1) ... [2023-11-06 22:32:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:44,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:32:44,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:32:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:32:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:32:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:32:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:32:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:32:44,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:32:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:32:44,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:32:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:32:44,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:32:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:32:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:32:44,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:32:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:32:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:32:44,979 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:32:45,193 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:32:45,195 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:32:45,756 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:32:45,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:32:45,945 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:32:45,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:45 BoogieIcfgContainer [2023-11-06 22:32:45,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:32:45,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:32:45,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:32:45,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:32:45,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:32:44" (1/3) ... [2023-11-06 22:32:45,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716d2f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:45, skipping insertion in model container [2023-11-06 22:32:45,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:44" (2/3) ... [2023-11-06 22:32:45,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716d2f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:45, skipping insertion in model container [2023-11-06 22:32:45,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:45" (3/3) ... [2023-11-06 22:32:45,958 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-11-06 22:32:45,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:32:45,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:32:45,978 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:32:46,059 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:32:46,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 218 transitions, 450 flow [2023-11-06 22:32:46,182 INFO L124 PetriNetUnfolderBase]: 15/216 cut-off events. [2023-11-06 22:32:46,182 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:32:46,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 216 events. 15/216 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 219 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-11-06 22:32:46,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 218 transitions, 450 flow [2023-11-06 22:32:46,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 211 transitions, 434 flow [2023-11-06 22:32:46,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:32:46,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 211 transitions, 434 flow [2023-11-06 22:32:46,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 211 transitions, 434 flow [2023-11-06 22:32:46,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 434 flow [2023-11-06 22:32:46,290 INFO L124 PetriNetUnfolderBase]: 15/211 cut-off events. [2023-11-06 22:32:46,291 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:32:46,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 211 events. 15/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-11-06 22:32:46,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-11-06 22:33:16,417 INFO L134 LiptonReduction]: Checked pairs total: 3450 [2023-11-06 22:33:16,417 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-06 22:33:16,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:33:16,452 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;@7c99144, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:33:16,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-06 22:33:16,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:33:16,456 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:33:16,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:33:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:33:16,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:16,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash 28633, now seen corresponding path program 1 times [2023-11-06 22:33:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779472042] [2023-11-06 22:33:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:16,478 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 [2023-11-06 22:33:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:16,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:16,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:16,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:33:16,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:16,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:33:16,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:16,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:16,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:16,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:33:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:16,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:16,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:16,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:16,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:16,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779472042] [2023-11-06 22:33:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779472042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:16,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:16,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:33:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775838876] [2023-11-06 22:33:16,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:33:17,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:33:17,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-06 22:33:17,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:17,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:33:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:17,790 INFO L124 PetriNetUnfolderBase]: 707/1084 cut-off events. [2023-11-06 22:33:17,790 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:33:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 1084 events. 707/1084 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5243 event pairs, 463 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 2018. Up to 1072 conditions per place. [2023-11-06 22:33:17,802 INFO L140 encePairwiseOnDemand]: 439/453 looper letters, 46 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-06 22:33:17,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 222 flow [2023-11-06 22:33:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:33:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-11-06 22:33:17,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44150110375275936 [2023-11-06 22:33:17,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-11-06 22:33:17,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-11-06 22:33:17,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:17,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-11-06 22:33:17,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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) [2023-11-06 22:33:17,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:17,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:17,843 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 110 flow. Second operand 3 states and 600 transitions. [2023-11-06 22:33:17,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 222 flow [2023-11-06 22:33:17,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:33:17,851 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 150 flow [2023-11-06 22:33:17,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2023-11-06 22:33:17,857 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-06 22:33:17,857 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 150 flow [2023-11-06 22:33:17,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-06 22:33:17,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:17,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:33:17,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:18,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:18,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:18,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 28632, now seen corresponding path program 1 times [2023-11-06 22:33:18,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:18,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986233715] [2023-11-06 22:33:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:18,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:18,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:18,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:18,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:33:18,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:18,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:33:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:18,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:33:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:18,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:33:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:18,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:33:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:18,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:33:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:18,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:33:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:18,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:18,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986233715] [2023-11-06 22:33:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986233715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:18,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:18,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:33:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586459594] [2023-11-06 22:33:18,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:33:18,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 453 [2023-11-06 22:33:18,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-11-06 22:33:18,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:18,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 453 [2023-11-06 22:33:18,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:18,779 INFO L124 PetriNetUnfolderBase]: 706/1078 cut-off events. [2023-11-06 22:33:18,779 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:33:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 1078 events. 706/1078 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5217 event pairs, 463 based on Foata normal form. 4/380 useless extension candidates. Maximal degree in co-relation 2151. Up to 1062 conditions per place. [2023-11-06 22:33:18,813 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 40 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-06 22:33:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 228 flow [2023-11-06 22:33:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:33:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-11-06 22:33:18,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434878587196468 [2023-11-06 22:33:18,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-11-06 22:33:18,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-11-06 22:33:18,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:18,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-11-06 22:33:18,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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) [2023-11-06 22:33:18,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:18,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:18,826 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 150 flow. Second operand 3 states and 591 transitions. [2023-11-06 22:33:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 228 flow [2023-11-06 22:33:18,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:33:18,829 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 138 flow [2023-11-06 22:33:18,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-11-06 22:33:18,830 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-06 22:33:18,830 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 138 flow [2023-11-06 22:33:18,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-11-06 22:33:18,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:18,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:33:18,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:19,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:19,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:19,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 27613833, now seen corresponding path program 1 times [2023-11-06 22:33:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25064593] [2023-11-06 22:33:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:19,048 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 [2023-11-06 22:33:19,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:19,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:19,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:33:19,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:19,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:19,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 22:33:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:19,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25064593] [2023-11-06 22:33:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25064593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:19,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-06 22:33:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207198696] [2023-11-06 22:33:19,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:19,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:33:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:33:19,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:33:19,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 453 [2023-11-06 22:33:19,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 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) [2023-11-06 22:33:19,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:19,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 453 [2023-11-06 22:33:19,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:20,955 INFO L124 PetriNetUnfolderBase]: 709/1085 cut-off events. [2023-11-06 22:33:20,956 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:33:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 1085 events. 709/1085 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5264 event pairs, 463 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2133. Up to 1064 conditions per place. [2023-11-06 22:33:20,968 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 39 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-11-06 22:33:20,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 276 flow [2023-11-06 22:33:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:33:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:33:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 935 transitions. [2023-11-06 22:33:20,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41280353200883 [2023-11-06 22:33:20,973 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 935 transitions. [2023-11-06 22:33:20,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 935 transitions. [2023-11-06 22:33:20,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:20,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 935 transitions. [2023-11-06 22:33:20,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 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) [2023-11-06 22:33:20,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 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) [2023-11-06 22:33:20,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 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) [2023-11-06 22:33:20,991 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 138 flow. Second operand 5 states and 935 transitions. [2023-11-06 22:33:20,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 276 flow [2023-11-06 22:33:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:33:20,996 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 186 flow [2023-11-06 22:33:20,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-11-06 22:33:20,998 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-06 22:33:20,998 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 186 flow [2023-11-06 22:33:20,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 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) [2023-11-06 22:33:20,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:20,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:33:21,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:21,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:21,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash 890779, now seen corresponding path program 1 times [2023-11-06 22:33:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428720216] [2023-11-06 22:33:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:21,205 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 [2023-11-06 22:33:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:21,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:21,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:21,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:33:21,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:21,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:33:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:21,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:21,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428720216] [2023-11-06 22:33:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428720216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:21,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:21,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:33:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099006652] [2023-11-06 22:33:21,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:21,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:33:21,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 453 [2023-11-06 22:33:21,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-06 22:33:21,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:21,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 453 [2023-11-06 22:33:21,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:21,940 INFO L124 PetriNetUnfolderBase]: 709/1084 cut-off events. [2023-11-06 22:33:21,941 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:33:21,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1084 events. 709/1084 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5294 event pairs, 463 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 2133. Up to 1069 conditions per place. [2023-11-06 22:33:21,950 INFO L140 encePairwiseOnDemand]: 448/453 looper letters, 41 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2023-11-06 22:33:21,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 280 flow [2023-11-06 22:33:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:33:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-11-06 22:33:21,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326710816777042 [2023-11-06 22:33:21,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-11-06 22:33:21,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-11-06 22:33:21,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:21,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-11-06 22:33:21,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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) [2023-11-06 22:33:21,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:21,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:21,972 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 186 flow. Second operand 3 states and 588 transitions. [2023-11-06 22:33:21,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 280 flow [2023-11-06 22:33:21,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:33:21,975 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 186 flow [2023-11-06 22:33:21,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-11-06 22:33:21,976 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-11-06 22:33:21,976 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 186 flow [2023-11-06 22:33:21,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-06 22:33:21,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:21,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:33:22,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:22,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:22,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:22,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash 889193, now seen corresponding path program 1 times [2023-11-06 22:33:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:22,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141688268] [2023-11-06 22:33:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:22,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:22,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:22,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:22,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:22,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:33:22,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:22,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:33:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:22,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:22,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:22,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:22,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:22,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:22,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:33:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:22,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:22,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141688268] [2023-11-06 22:33:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141688268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:22,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:33:22,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857469835] [2023-11-06 22:33:22,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:22,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:33:22,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:33:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:33:23,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 453 [2023-11-06 22:33:23,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 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) [2023-11-06 22:33:23,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:23,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 453 [2023-11-06 22:33:23,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:25,429 INFO L124 PetriNetUnfolderBase]: 717/1094 cut-off events. [2023-11-06 22:33:25,429 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:33:25,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 1094 events. 717/1094 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5301 event pairs, 463 based on Foata normal form. 6/397 useless extension candidates. Maximal degree in co-relation 2133. Up to 1075 conditions per place. [2023-11-06 22:33:25,437 INFO L140 encePairwiseOnDemand]: 444/453 looper letters, 40 selfloop transitions, 22 changer transitions 0/63 dead transitions. [2023-11-06 22:33:25,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 390 flow [2023-11-06 22:33:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:33:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:33:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-11-06 22:33:25,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40029433406916853 [2023-11-06 22:33:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-11-06 22:33:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-11-06 22:33:25,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:25,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-11-06 22:33:25,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 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) [2023-11-06 22:33:25,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 453.0) internal successors, (3171), 7 states have internal predecessors, (3171), 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) [2023-11-06 22:33:25,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 453.0) internal successors, (3171), 7 states have internal predecessors, (3171), 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) [2023-11-06 22:33:25,468 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 186 flow. Second operand 6 states and 1088 transitions. [2023-11-06 22:33:25,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 390 flow [2023-11-06 22:33:25,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 346 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:33:25,471 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 312 flow [2023-11-06 22:33:25,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=53, PETRI_TRANSITIONS=63} [2023-11-06 22:33:25,473 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-06 22:33:25,473 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 312 flow [2023-11-06 22:33:25,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 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) [2023-11-06 22:33:25,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:25,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-06 22:33:25,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:25,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:25,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash 856028510, now seen corresponding path program 1 times [2023-11-06 22:33:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:25,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843337028] [2023-11-06 22:33:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:25,686 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 [2023-11-06 22:33:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:25,688 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:25,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:25,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:33:25,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:25,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:33:25,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:33:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:25,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:33:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:25,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:33:26,076 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:33:26,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:33:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:26,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:27,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843337028] [2023-11-06 22:33:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843337028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:27,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:33:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097264428] [2023-11-06 22:33:27,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:33:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:33:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:33:31,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 453 [2023-11-06 22:33:31,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 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) [2023-11-06 22:33:31,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:31,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 453 [2023-11-06 22:33:31,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:33,278 INFO L124 PetriNetUnfolderBase]: 1058/1654 cut-off events. [2023-11-06 22:33:33,278 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:33:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 1654 events. 1058/1654 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 8797 event pairs, 690 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 3326. Up to 816 conditions per place. [2023-11-06 22:33:33,293 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 72 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2023-11-06 22:33:33,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 522 flow [2023-11-06 22:33:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1718 transitions. [2023-11-06 22:33:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792494481236203 [2023-11-06 22:33:33,301 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1718 transitions. [2023-11-06 22:33:33,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1718 transitions. [2023-11-06 22:33:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1718 transitions. [2023-11-06 22:33:33,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.8) internal successors, (1718), 10 states have internal predecessors, (1718), 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) [2023-11-06 22:33:33,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 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) [2023-11-06 22:33:33,318 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 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) [2023-11-06 22:33:33,318 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 312 flow. Second operand 10 states and 1718 transitions. [2023-11-06 22:33:33,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 522 flow [2023-11-06 22:33:33,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 473 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-06 22:33:33,323 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 263 flow [2023-11-06 22:33:33,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-06 22:33:33,324 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-11-06 22:33:33,324 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 263 flow [2023-11-06 22:33:33,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 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) [2023-11-06 22:33:33,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:33,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:33:33,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:33,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:33,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 27613837, now seen corresponding path program 1 times [2023-11-06 22:33:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:33,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804307651] [2023-11-06 22:33:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:33,542 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 [2023-11-06 22:33:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:33,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:33,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:33:33,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:33,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:33,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-06 22:33:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:33,731 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:33:33,732 INFO L351 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 [2023-11-06 22:33:33,786 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:33:33,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:33:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:33:33,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:33,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804307651] [2023-11-06 22:33:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804307651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:33,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:33,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:33:33,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142206029] [2023-11-06 22:33:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:33,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:33,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:33:34,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 453 [2023-11-06 22:33:34,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2023-11-06 22:33:34,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:34,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 453 [2023-11-06 22:33:34,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:34,402 INFO L124 PetriNetUnfolderBase]: 700/1150 cut-off events. [2023-11-06 22:33:34,403 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:33:34,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 1150 events. 700/1150 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 6001 event pairs, 454 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 2316. Up to 1134 conditions per place. [2023-11-06 22:33:34,411 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 51 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-06 22:33:34,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 337 flow [2023-11-06 22:33:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:33:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-11-06 22:33:34,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392935982339956 [2023-11-06 22:33:34,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-11-06 22:33:34,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-11-06 22:33:34,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:34,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-11-06 22:33:34,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2023-11-06 22:33:34,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:34,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:34,421 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 263 flow. Second operand 3 states and 597 transitions. [2023-11-06 22:33:34,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 337 flow [2023-11-06 22:33:34,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 303 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-06 22:33:34,425 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 201 flow [2023-11-06 22:33:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-11-06 22:33:34,426 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-06 22:33:34,426 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 201 flow [2023-11-06 22:33:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2023-11-06 22:33:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:34,427 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:33:34,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-06 22:33:34,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:34,638 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:34,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 721703897, now seen corresponding path program 2 times [2023-11-06 22:33:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526362733] [2023-11-06 22:33:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:34,639 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 [2023-11-06 22:33:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:34,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:34,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:34,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:34,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:34,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:33:34,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:34,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:33:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:34,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:34,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:34,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:34,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:33:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:34,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:33:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:34,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:35,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526362733] [2023-11-06 22:33:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526362733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:35,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:33:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975140649] [2023-11-06 22:33:35,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:33:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:33:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:33:41,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:33:41,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 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) [2023-11-06 22:33:41,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:41,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:33:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:45,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:47,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:49,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:51,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:52,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:33:54,161 INFO L124 PetriNetUnfolderBase]: 712/1176 cut-off events. [2023-11-06 22:33:54,161 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 22:33:54,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 1176 events. 712/1176 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 6163 event pairs, 454 based on Foata normal form. 10/564 useless extension candidates. Maximal degree in co-relation 2454. Up to 1129 conditions per place. [2023-11-06 22:33:54,170 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 38 selfloop transitions, 40 changer transitions 0/79 dead transitions. [2023-11-06 22:33:54,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 533 flow [2023-11-06 22:33:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:33:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:33:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2668 transitions. [2023-11-06 22:33:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39264164827078735 [2023-11-06 22:33:54,182 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2668 transitions. [2023-11-06 22:33:54,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2668 transitions. [2023-11-06 22:33:54,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:54,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2668 transitions. [2023-11-06 22:33:54,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 177.86666666666667) internal successors, (2668), 15 states have internal predecessors, (2668), 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) [2023-11-06 22:33:54,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 453.0) internal successors, (7248), 16 states have internal predecessors, (7248), 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) [2023-11-06 22:33:54,206 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 453.0) internal successors, (7248), 16 states have internal predecessors, (7248), 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) [2023-11-06 22:33:54,206 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 201 flow. Second operand 15 states and 2668 transitions. [2023-11-06 22:33:54,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 533 flow [2023-11-06 22:33:54,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:33:54,210 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 492 flow [2023-11-06 22:33:54,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=492, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-11-06 22:33:54,211 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-11-06 22:33:54,211 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 492 flow [2023-11-06 22:33:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 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) [2023-11-06 22:33:54,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:54,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:33:54,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 22:33:54,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:54,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:54,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 767112059, now seen corresponding path program 1 times [2023-11-06 22:33:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:54,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275501246] [2023-11-06 22:33:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:54,425 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 [2023-11-06 22:33:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:54,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:54,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:33:54,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:54,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:33:54,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:33:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:54,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:54,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:33:54,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:54,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:54,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:33:54,652 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:33:54,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:33:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:54,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:55,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275501246] [2023-11-06 22:33:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275501246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:55,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:55,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-06 22:33:55,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703359866] [2023-11-06 22:33:55,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:33:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:33:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:33:57,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 453 [2023-11-06 22:33:57,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 168.33333333333334) internal successors, (1515), 9 states have internal predecessors, (1515), 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) [2023-11-06 22:33:57,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:57,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 453 [2023-11-06 22:33:57,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:58,454 INFO L124 PetriNetUnfolderBase]: 668/1096 cut-off events. [2023-11-06 22:33:58,454 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-06 22:33:58,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 1096 events. 668/1096 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 5707 event pairs, 422 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 2374. Up to 538 conditions per place. [2023-11-06 22:33:58,464 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 85 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2023-11-06 22:33:58,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 752 flow [2023-11-06 22:33:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:33:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:33:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1410 transitions. [2023-11-06 22:33:58,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890728476821192 [2023-11-06 22:33:58,471 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1410 transitions. [2023-11-06 22:33:58,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1410 transitions. [2023-11-06 22:33:58,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:58,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1410 transitions. [2023-11-06 22:33:58,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.25) internal successors, (1410), 8 states have internal predecessors, (1410), 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) [2023-11-06 22:33:58,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 453.0) internal successors, (4077), 9 states have internal predecessors, (4077), 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) [2023-11-06 22:33:58,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 453.0) internal successors, (4077), 9 states have internal predecessors, (4077), 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) [2023-11-06 22:33:58,484 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 492 flow. Second operand 8 states and 1410 transitions. [2023-11-06 22:33:58,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 752 flow [2023-11-06 22:33:58,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 630 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-06 22:33:58,491 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 400 flow [2023-11-06 22:33:58,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=400, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-11-06 22:33:58,492 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-11-06 22:33:58,492 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 400 flow [2023-11-06 22:33:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 168.33333333333334) internal successors, (1515), 9 states have internal predecessors, (1515), 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) [2023-11-06 22:33:58,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:58,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:33:58,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 22:33:58,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:58,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:58,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash 767112061, now seen corresponding path program 1 times [2023-11-06 22:33:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:58,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183768959] [2023-11-06 22:33:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:58,707 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 [2023-11-06 22:33:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:58,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:58,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:33:58,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:58,879 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:33:58,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 22:33:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:58,894 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:33:58,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:33:58,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:58,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:58,919 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:33:58,920 INFO L351 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 [2023-11-06 22:33:58,939 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:33:58,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:33:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:33:58,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:58,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183768959] [2023-11-06 22:33:58,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183768959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:58,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:58,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:33:58,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032297690] [2023-11-06 22:33:58,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:33:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 453 [2023-11-06 22:33:59,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-11-06 22:33:59,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:59,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 453 [2023-11-06 22:33:59,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:59,392 INFO L124 PetriNetUnfolderBase]: 624/1016 cut-off events. [2023-11-06 22:33:59,392 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-11-06 22:33:59,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 1016 events. 624/1016 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 5206 event pairs, 390 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 2170. Up to 1000 conditions per place. [2023-11-06 22:33:59,398 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 71 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-11-06 22:33:59,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 540 flow [2023-11-06 22:33:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:33:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-11-06 22:33:59,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43193524650478293 [2023-11-06 22:33:59,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-11-06 22:33:59,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-11-06 22:33:59,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:59,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-11-06 22:33:59,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2023-11-06 22:33:59,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:59,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:33:59,407 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 400 flow. Second operand 3 states and 587 transitions. [2023-11-06 22:33:59,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 540 flow [2023-11-06 22:33:59,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 507 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:33:59,413 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 365 flow [2023-11-06 22:33:59,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-11-06 22:33:59,413 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-11-06 22:33:59,414 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 365 flow [2023-11-06 22:33:59,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-11-06 22:33:59,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:59,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:33:59,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:59,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:59,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:33:59,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash 767112067, now seen corresponding path program 1 times [2023-11-06 22:33:59,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:59,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643525247] [2023-11-06 22:33:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:59,627 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 [2023-11-06 22:33:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:59,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:33:59,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:33:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:59,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:33:59,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:33:59,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:59,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643525247] [2023-11-06 22:33:59,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643525247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:59,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:59,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:33:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418415146] [2023-11-06 22:33:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:33:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:33:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:33:59,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:33:59,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 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) [2023-11-06 22:33:59,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:59,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:33:59,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:00,460 INFO L124 PetriNetUnfolderBase]: 710/1214 cut-off events. [2023-11-06 22:34:00,460 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-06 22:34:00,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 1214 events. 710/1214 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 6558 event pairs, 456 based on Foata normal form. 12/694 useless extension candidates. Maximal degree in co-relation 2620. Up to 999 conditions per place. [2023-11-06 22:34:00,470 INFO L140 encePairwiseOnDemand]: 442/453 looper letters, 105 selfloop transitions, 3 changer transitions 1/110 dead transitions. [2023-11-06 22:34:00,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 110 transitions, 759 flow [2023-11-06 22:34:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:34:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:34:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-11-06 22:34:00,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310154525386313 [2023-11-06 22:34:00,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-11-06 22:34:00,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-11-06 22:34:00,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:00,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-11-06 22:34:00,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 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) [2023-11-06 22:34:00,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:00,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:00,482 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 365 flow. Second operand 4 states and 781 transitions. [2023-11-06 22:34:00,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 110 transitions, 759 flow [2023-11-06 22:34:00,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:34:00,488 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 387 flow [2023-11-06 22:34:00,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-11-06 22:34:00,489 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2023-11-06 22:34:00,489 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 387 flow [2023-11-06 22:34:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 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) [2023-11-06 22:34:00,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:00,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:34:00,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:00,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:00,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:00,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash 767111961, now seen corresponding path program 1 times [2023-11-06 22:34:00,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:00,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335702711] [2023-11-06 22:34:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:00,702 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 [2023-11-06 22:34:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:00,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:34:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:00,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:00,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:00,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:00,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:00,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335702711] [2023-11-06 22:34:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335702711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:00,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:00,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:34:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704156267] [2023-11-06 22:34:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:34:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:34:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:34:01,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:34:01,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 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) [2023-11-06 22:34:01,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:01,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:34:01,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:01,763 INFO L124 PetriNetUnfolderBase]: 1386/2268 cut-off events. [2023-11-06 22:34:01,764 INFO L125 PetriNetUnfolderBase]: For 351/367 co-relation queries the response was YES. [2023-11-06 22:34:01,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 2268 events. 1386/2268 cut-off events. For 351/367 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 13590 event pairs, 404 based on Foata normal form. 0/1456 useless extension candidates. Maximal degree in co-relation 5558. Up to 1279 conditions per place. [2023-11-06 22:34:01,783 INFO L140 encePairwiseOnDemand]: 447/453 looper letters, 82 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2023-11-06 22:34:01,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 640 flow [2023-11-06 22:34:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:34:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:34:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 778 transitions. [2023-11-06 22:34:01,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42935982339955847 [2023-11-06 22:34:01,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 778 transitions. [2023-11-06 22:34:01,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 778 transitions. [2023-11-06 22:34:01,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:01,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 778 transitions. [2023-11-06 22:34:01,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 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) [2023-11-06 22:34:01,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:01,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:01,794 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 387 flow. Second operand 4 states and 778 transitions. [2023-11-06 22:34:01,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 640 flow [2023-11-06 22:34:01,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:34:01,800 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 432 flow [2023-11-06 22:34:01,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=432, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2023-11-06 22:34:01,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-11-06 22:34:01,801 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 432 flow [2023-11-06 22:34:01,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 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) [2023-11-06 22:34:01,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:01,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:34:01,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:02,013 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:02,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash 767111960, now seen corresponding path program 1 times [2023-11-06 22:34:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789466038] [2023-11-06 22:34:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:02,014 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 [2023-11-06 22:34:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:02,016 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:02,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:34:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:02,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:34:02,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:02,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:02,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:02,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789466038] [2023-11-06 22:34:02,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789466038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:02,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:02,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37703395] [2023-11-06 22:34:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:02,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:34:02,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:34:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:34:02,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 453 [2023-11-06 22:34:02,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-11-06 22:34:02,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:02,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 453 [2023-11-06 22:34:02,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:02,794 INFO L124 PetriNetUnfolderBase]: 1150/1894 cut-off events. [2023-11-06 22:34:02,795 INFO L125 PetriNetUnfolderBase]: For 571/577 co-relation queries the response was YES. [2023-11-06 22:34:02,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 1894 events. 1150/1894 cut-off events. For 571/577 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11030 event pairs, 742 based on Foata normal form. 0/1346 useless extension candidates. Maximal degree in co-relation 4929. Up to 1822 conditions per place. [2023-11-06 22:34:02,807 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 62 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2023-11-06 22:34:02,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 570 flow [2023-11-06 22:34:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:34:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:34:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-11-06 22:34:02,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304635761589404 [2023-11-06 22:34:02,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-11-06 22:34:02,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-11-06 22:34:02,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:02,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-11-06 22:34:02,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2023-11-06 22:34:02,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:34:02,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 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) [2023-11-06 22:34:02,816 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 432 flow. Second operand 3 states and 585 transitions. [2023-11-06 22:34:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 570 flow [2023-11-06 22:34:02,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:34:02,823 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 432 flow [2023-11-06 22:34:02,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-11-06 22:34:02,826 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2023-11-06 22:34:02,826 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 432 flow [2023-11-06 22:34:02,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-11-06 22:34:02,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:02,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:02,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:03,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:03,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 943394067, now seen corresponding path program 1 times [2023-11-06 22:34:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:03,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709504557] [2023-11-06 22:34:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:03,040 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 [2023-11-06 22:34:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:03,041 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:03,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:34:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:03,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:03,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:34:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:03,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:34:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:03,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:34:03,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:03,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:34:03,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:03,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:34:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:03,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:34:03,315 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:34:03,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:34:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:34:03,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:03,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:03,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709504557] [2023-11-06 22:34:03,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709504557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:03,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71444593] [2023-11-06 22:34:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:34:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:34:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:34:03,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:34:03,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 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) [2023-11-06 22:34:03,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:03,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:34:03,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:04,011 INFO L124 PetriNetUnfolderBase]: 882/1498 cut-off events. [2023-11-06 22:34:04,012 INFO L125 PetriNetUnfolderBase]: For 541/547 co-relation queries the response was YES. [2023-11-06 22:34:04,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3837 conditions, 1498 events. 882/1498 cut-off events. For 541/547 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8453 event pairs, 574 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 3815. Up to 1428 conditions per place. [2023-11-06 22:34:04,018 INFO L140 encePairwiseOnDemand]: 448/453 looper letters, 48 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2023-11-06 22:34:04,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 564 flow [2023-11-06 22:34:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:34:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:34:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 931 transitions. [2023-11-06 22:34:04,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411037527593819 [2023-11-06 22:34:04,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 931 transitions. [2023-11-06 22:34:04,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 931 transitions. [2023-11-06 22:34:04,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:04,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 931 transitions. [2023-11-06 22:34:04,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.2) internal successors, (931), 5 states have internal predecessors, (931), 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) [2023-11-06 22:34:04,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 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) [2023-11-06 22:34:04,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 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) [2023-11-06 22:34:04,030 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 432 flow. Second operand 5 states and 931 transitions. [2023-11-06 22:34:04,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 564 flow [2023-11-06 22:34:04,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:34:04,036 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 458 flow [2023-11-06 22:34:04,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-06 22:34:04,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-11-06 22:34:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 458 flow [2023-11-06 22:34:04,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 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) [2023-11-06 22:34:04,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:04,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:04,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-06 22:34:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:04,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 943394068, now seen corresponding path program 1 times [2023-11-06 22:34:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055283412] [2023-11-06 22:34:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:04,251 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 [2023-11-06 22:34:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:04,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:04,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:34:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:04,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:34:04,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:04,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:34:04,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:34:04,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:34:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:34:04,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:34:04,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:34:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:34:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:34:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:34:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:04,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:34:04,728 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:34:04,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:34:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:04,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:05,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055283412] [2023-11-06 22:34:05,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055283412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:05,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:05,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:34:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874215504] [2023-11-06 22:34:05,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:05,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:34:05,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:34:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:34:09,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 453 [2023-11-06 22:34:09,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 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) [2023-11-06 22:34:09,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:09,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 453 [2023-11-06 22:34:09,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:17,682 INFO L124 PetriNetUnfolderBase]: 1906/3194 cut-off events. [2023-11-06 22:34:17,683 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2023-11-06 22:34:17,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 3194 events. 1906/3194 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19837 event pairs, 1222 based on Foata normal form. 76/2814 useless extension candidates. Maximal degree in co-relation 8068. Up to 1195 conditions per place. [2023-11-06 22:34:17,700 INFO L140 encePairwiseOnDemand]: 444/453 looper letters, 142 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2023-11-06 22:34:17,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 162 transitions, 1317 flow [2023-11-06 22:34:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:34:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:34:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2037 transitions. [2023-11-06 22:34:17,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472406181015455 [2023-11-06 22:34:17,709 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2037 transitions. [2023-11-06 22:34:17,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2037 transitions. [2023-11-06 22:34:17,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:17,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2037 transitions. [2023-11-06 22:34:17,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.75) internal successors, (2037), 12 states have internal predecessors, (2037), 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) [2023-11-06 22:34:17,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 453.0) internal successors, (5889), 13 states have internal predecessors, (5889), 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) [2023-11-06 22:34:17,720 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 453.0) internal successors, (5889), 13 states have internal predecessors, (5889), 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) [2023-11-06 22:34:17,720 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 458 flow. Second operand 12 states and 2037 transitions. [2023-11-06 22:34:17,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 162 transitions, 1317 flow [2023-11-06 22:34:17,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 162 transitions, 1262 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:34:17,729 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 578 flow [2023-11-06 22:34:17,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=578, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-11-06 22:34:17,730 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2023-11-06 22:34:17,730 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 578 flow [2023-11-06 22:34:17,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 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) [2023-11-06 22:34:17,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:17,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:17,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:17,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:17,944 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:17,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:17,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1539712907, now seen corresponding path program 1 times [2023-11-06 22:34:17,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:17,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669040404] [2023-11-06 22:34:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:17,945 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 [2023-11-06 22:34:17,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:17,946 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:17,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:34:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:18,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:34:18,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:18,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:34:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:18,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:18,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:18,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669040404] [2023-11-06 22:34:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669040404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:18,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:34:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087280540] [2023-11-06 22:34:18,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:18,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:34:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:34:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:34:21,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:34:21,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 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) [2023-11-06 22:34:21,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:21,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:34:21,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:25,239 INFO L124 PetriNetUnfolderBase]: 3972/6374 cut-off events. [2023-11-06 22:34:25,239 INFO L125 PetriNetUnfolderBase]: For 3153/3177 co-relation queries the response was YES. [2023-11-06 22:34:25,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16658 conditions, 6374 events. 3972/6374 cut-off events. For 3153/3177 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41672 event pairs, 376 based on Foata normal form. 228/5862 useless extension candidates. Maximal degree in co-relation 16629. Up to 1816 conditions per place. [2023-11-06 22:34:25,278 INFO L140 encePairwiseOnDemand]: 442/453 looper letters, 110 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2023-11-06 22:34:25,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 149 transitions, 1109 flow [2023-11-06 22:34:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:34:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:34:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1653 transitions. [2023-11-06 22:34:25,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40544518027961735 [2023-11-06 22:34:25,286 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1653 transitions. [2023-11-06 22:34:25,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1653 transitions. [2023-11-06 22:34:25,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:25,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1653 transitions. [2023-11-06 22:34:25,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 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) [2023-11-06 22:34:25,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 453.0) internal successors, (4530), 10 states have internal predecessors, (4530), 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) [2023-11-06 22:34:25,299 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 453.0) internal successors, (4530), 10 states have internal predecessors, (4530), 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) [2023-11-06 22:34:25,299 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 578 flow. Second operand 9 states and 1653 transitions. [2023-11-06 22:34:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 149 transitions, 1109 flow [2023-11-06 22:34:25,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 149 transitions, 1098 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:34:25,313 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 740 flow [2023-11-06 22:34:25,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=740, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2023-11-06 22:34:25,314 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-11-06 22:34:25,314 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 740 flow [2023-11-06 22:34:25,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 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) [2023-11-06 22:34:25,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:25,315 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:25,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:25,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:25,528 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:25,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1406462076, now seen corresponding path program 2 times [2023-11-06 22:34:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268688948] [2023-11-06 22:34:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:34:25,529 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 [2023-11-06 22:34:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:25,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:25,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:34:25,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:34:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:25,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:34:25,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:25,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:34:25,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 22:34:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:34:25,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:34:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:34:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:34:25,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:34:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:34:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:34:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:25,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:34:25,997 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:34:25,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:34:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:34:26,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:26,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:26,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268688948] [2023-11-06 22:34:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268688948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:26,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369598819] [2023-11-06 22:34:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:34:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:34:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:34:26,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 453 [2023-11-06 22:34:26,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 740 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 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) [2023-11-06 22:34:26,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:26,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 453 [2023-11-06 22:34:26,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:27,546 INFO L124 PetriNetUnfolderBase]: 3388/5576 cut-off events. [2023-11-06 22:34:27,547 INFO L125 PetriNetUnfolderBase]: For 6333/6381 co-relation queries the response was YES. [2023-11-06 22:34:27,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16780 conditions, 5576 events. 3388/5576 cut-off events. For 6333/6381 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36845 event pairs, 2180 based on Foata normal form. 314/5348 useless extension candidates. Maximal degree in co-relation 16745. Up to 5515 conditions per place. [2023-11-06 22:34:27,586 INFO L140 encePairwiseOnDemand]: 449/453 looper letters, 73 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-11-06 22:34:27,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 880 flow [2023-11-06 22:34:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:34:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:34:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-11-06 22:34:27,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045253863134658 [2023-11-06 22:34:27,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-11-06 22:34:27,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-11-06 22:34:27,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:27,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-11-06 22:34:27,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 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) [2023-11-06 22:34:27,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 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) [2023-11-06 22:34:27,598 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 740 flow. Second operand 4 states and 733 transitions. [2023-11-06 22:34:27,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 880 flow [2023-11-06 22:34:27,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 817 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:34:27,619 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 671 flow [2023-11-06 22:34:27,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=671, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2023-11-06 22:34:27,620 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2023-11-06 22:34:27,620 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 671 flow [2023-11-06 22:34:27,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 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) [2023-11-06 22:34:27,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:27,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:27,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-06 22:34:27,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:27,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:27,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1614398729, now seen corresponding path program 1 times [2023-11-06 22:34:27,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:27,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268917866] [2023-11-06 22:34:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:27,834 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 [2023-11-06 22:34:27,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:27,835 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:27,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:34:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:27,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:34:27,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:34:28,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:28,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-11-06 22:34:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:34:28,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:28,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268917866] [2023-11-06 22:34:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268917866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:28,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:34:28,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459978654] [2023-11-06 22:34:28,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:34:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:34:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:34:30,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 453 [2023-11-06 22:34:30,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 671 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 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) [2023-11-06 22:34:30,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:30,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 453 [2023-11-06 22:34:30,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:32,826 INFO L124 PetriNetUnfolderBase]: 3272/5418 cut-off events. [2023-11-06 22:34:32,826 INFO L125 PetriNetUnfolderBase]: For 3252/3270 co-relation queries the response was YES. [2023-11-06 22:34:32,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15762 conditions, 5418 events. 3272/5418 cut-off events. For 3252/3270 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35306 event pairs, 302 based on Foata normal form. 180/5118 useless extension candidates. Maximal degree in co-relation 15728. Up to 937 conditions per place. [2023-11-06 22:34:32,855 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 121 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2023-11-06 22:34:32,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 151 transitions, 1141 flow [2023-11-06 22:34:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:34:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:34:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1856 transitions. [2023-11-06 22:34:32,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40971302428256073 [2023-11-06 22:34:32,861 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1856 transitions. [2023-11-06 22:34:32,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1856 transitions. [2023-11-06 22:34:32,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:32,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1856 transitions. [2023-11-06 22:34:32,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.6) internal successors, (1856), 10 states have internal predecessors, (1856), 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) [2023-11-06 22:34:32,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 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) [2023-11-06 22:34:32,874 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 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) [2023-11-06 22:34:32,874 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 671 flow. Second operand 10 states and 1856 transitions. [2023-11-06 22:34:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 151 transitions, 1141 flow [2023-11-06 22:34:32,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 1120 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:34:32,894 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 721 flow [2023-11-06 22:34:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=721, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2023-11-06 22:34:32,895 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2023-11-06 22:34:32,895 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 721 flow [2023-11-06 22:34:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 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) [2023-11-06 22:34:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2023-11-06 22:34:32,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:33,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:33,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:34:33,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2068137771, now seen corresponding path program 1 times [2023-11-06 22:34:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:34:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413842235] [2023-11-06 22:34:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:33,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:34:33,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:34:33,114 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:34:33,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:34:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:33,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:34:33,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:33,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:34:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:33,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:35,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:34:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413842235] [2023-11-06 22:34:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413842235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-06 22:34:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434078690] [2023-11-06 22:34:35,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:35,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:34:35,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:34:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:34:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:34:51,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:34:51,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 721 flow. Second operand has 18 states, 18 states have (on average 173.05555555555554) internal successors, (3115), 18 states have internal predecessors, (3115), 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) [2023-11-06 22:34:51,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:51,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:34:51,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:56,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:34:58,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:00,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:02,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:04,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:06,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:08,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:13,402 INFO L124 PetriNetUnfolderBase]: 3266/5430 cut-off events. [2023-11-06 22:35:13,402 INFO L125 PetriNetUnfolderBase]: For 4905/4905 co-relation queries the response was YES. [2023-11-06 22:35:13,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16864 conditions, 5430 events. 3266/5430 cut-off events. For 4905/4905 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 35001 event pairs, 2118 based on Foata normal form. 32/5016 useless extension candidates. Maximal degree in co-relation 16830. Up to 5318 conditions per place. [2023-11-06 22:35:13,441 INFO L140 encePairwiseOnDemand]: 447/453 looper letters, 43 selfloop transitions, 58 changer transitions 0/102 dead transitions. [2023-11-06 22:35:13,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 1043 flow [2023-11-06 22:35:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:35:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:35:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3181 transitions. [2023-11-06 22:35:13,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901152808437577 [2023-11-06 22:35:13,448 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3181 transitions. [2023-11-06 22:35:13,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3181 transitions. [2023-11-06 22:35:13,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:35:13,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3181 transitions. [2023-11-06 22:35:13,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 176.72222222222223) internal successors, (3181), 18 states have internal predecessors, (3181), 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) [2023-11-06 22:35:13,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 453.0) internal successors, (8607), 19 states have internal predecessors, (8607), 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) [2023-11-06 22:35:13,548 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 453.0) internal successors, (8607), 19 states have internal predecessors, (8607), 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) [2023-11-06 22:35:13,548 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 721 flow. Second operand 18 states and 3181 transitions. [2023-11-06 22:35:13,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 1043 flow [2023-11-06 22:35:13,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 968 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-06 22:35:13,574 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 967 flow [2023-11-06 22:35:13,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=967, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-11-06 22:35:13,575 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2023-11-06 22:35:13,576 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 967 flow [2023-11-06 22:35:13,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 173.05555555555554) internal successors, (3115), 18 states have internal predecessors, (3115), 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) [2023-11-06 22:35:13,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:35:13,577 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:35:13,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:35:13,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:35:13,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 617114073, now seen corresponding path program 3 times [2023-11-06 22:35:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:35:13,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034711725] [2023-11-06 22:35:13,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:35:13,790 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 [2023-11-06 22:35:13,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:35:13,791 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:35:13,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:35:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:35:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:14,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:35:14,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:14,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:35:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:35:14,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:35:14,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:35:14,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:35:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:35:14,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:35:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:35:14,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:35:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:35:14,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:35:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:35:14,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:35:17,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:35:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034711725] [2023-11-06 22:35:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034711725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:17,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:35:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:35:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940916150] [2023-11-06 22:35:17,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:17,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:35:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:35:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:35:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:35:42,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:35:42,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 967 flow. Second operand has 24 states, 24 states have (on average 173.0) internal successors, (4152), 24 states have internal predecessors, (4152), 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) [2023-11-06 22:35:42,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:35:42,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:35:42,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:35:55,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:57,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:35:59,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:01,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:03,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:05,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:07,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:09,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:11,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:13,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:36:23,580 INFO L124 PetriNetUnfolderBase]: 3308/5482 cut-off events. [2023-11-06 22:36:23,581 INFO L125 PetriNetUnfolderBase]: For 3474/3474 co-relation queries the response was YES. [2023-11-06 22:36:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16364 conditions, 5482 events. 3308/5482 cut-off events. For 3474/3474 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35238 event pairs, 2142 based on Foata normal form. 12/5012 useless extension candidates. Maximal degree in co-relation 16322. Up to 5370 conditions per place. [2023-11-06 22:36:23,612 INFO L140 encePairwiseOnDemand]: 447/453 looper letters, 51 selfloop transitions, 74 changer transitions 0/126 dead transitions. [2023-11-06 22:36:23,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 126 transitions, 1409 flow [2023-11-06 22:36:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:36:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:36:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4233 transitions. [2023-11-06 22:36:23,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893487858719647 [2023-11-06 22:36:23,620 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4233 transitions. [2023-11-06 22:36:23,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4233 transitions. [2023-11-06 22:36:23,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:36:23,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4233 transitions. [2023-11-06 22:36:23,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.375) internal successors, (4233), 24 states have internal predecessors, (4233), 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) [2023-11-06 22:36:23,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 453.0) internal successors, (11325), 25 states have internal predecessors, (11325), 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) [2023-11-06 22:36:23,641 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 453.0) internal successors, (11325), 25 states have internal predecessors, (11325), 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) [2023-11-06 22:36:23,641 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 967 flow. Second operand 24 states and 4233 transitions. [2023-11-06 22:36:23,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 126 transitions, 1409 flow [2023-11-06 22:36:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 1270 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-11-06 22:36:23,679 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1236 flow [2023-11-06 22:36:23,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1236, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2023-11-06 22:36:23,680 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2023-11-06 22:36:23,680 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1236 flow [2023-11-06 22:36:23,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 173.0) internal successors, (4152), 24 states have internal predecessors, (4152), 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) [2023-11-06 22:36:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:36:23,682 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:23,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-06 22:36:23,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:36:23,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:36:23,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -884253047, now seen corresponding path program 2 times [2023-11-06 22:36:23,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:36:23,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40697423] [2023-11-06 22:36:23,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:23,896 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 [2023-11-06 22:36:23,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:36:23,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:36:23,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0ee23a-54c7-4d2c-8050-356599e75904/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:36:24,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:24,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:24,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:36:24,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:24,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:36:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:24,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:26,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:36:26,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40697423] [2023-11-06 22:36:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40697423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:26,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:36:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-06 22:36:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732865688] [2023-11-06 22:36:26,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:26,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:36:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:36:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:36:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:36:39,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 453 [2023-11-06 22:36:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 1236 flow. Second operand has 18 states, 18 states have (on average 164.55555555555554) internal successors, (2962), 18 states have internal predecessors, (2962), 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) [2023-11-06 22:36:39,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:36:39,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 453 [2023-11-06 22:36:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:36:45,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:36:47,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []