./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:33,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:33,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:43:33,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:33,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:33,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:33,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:33,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:33,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:33,694 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:33,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:33,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:33,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:33,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:33,701 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:33,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:33,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:43:33,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:33,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:43:33,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:33,704 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:43:33,705 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:43:33,705 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:43:33,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:33,706 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:43:33,706 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:43:33,707 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:43:33,707 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:33,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:33,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:33,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:33,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:33,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:33,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:33,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:33,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:43:33,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:43:33,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:33,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:33,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:33,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:33,714 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_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2023-11-24 21:43:34,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:34,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:34,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:34,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:34,106 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:34,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2023-11-24 21:43:37,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:37,453 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:37,454 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2023-11-24 21:43:37,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/36fb4bc83/6a08ddfd1efd46e9bd936ee86ef081af/FLAGedada3a48 [2023-11-24 21:43:37,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/36fb4bc83/6a08ddfd1efd46e9bd936ee86ef081af [2023-11-24 21:43:37,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:37,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:37,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:37,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:37,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:37,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:37" (1/1) ... [2023-11-24 21:43:37,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e76f641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:37, skipping insertion in model container [2023-11-24 21:43:37,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:37" (1/1) ... [2023-11-24 21:43:37,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:37,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:37,745 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-24 21:43:37,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a5c789d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:37, skipping insertion in model container [2023-11-24 21:43:37,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:37,746 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:43:37,748 INFO L158 Benchmark]: Toolchain (without parser) took 264.25ms. Allocated memory is still 159.4MB. Free memory was 116.2MB in the beginning and 106.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:43:37,749 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 119.5MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:43:37,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.52ms. Allocated memory is still 159.4MB. Free memory was 115.8MB in the beginning and 106.0MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:43:37,751 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 119.5MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.52ms. Allocated memory is still 159.4MB. Free memory was 115.8MB in the beginning and 106.0MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:40,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:40,318 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:43:40,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:40,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:40,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:40,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:40,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:40,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:40,390 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:40,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:40,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:40,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:40,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:40,394 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:40,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:40,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:43:40,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:40,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:43:40,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:40,397 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:43:40,399 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:43:40,400 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:43:40,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:40,401 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:43:40,401 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:43:40,402 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:43:40,402 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:43:40,403 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:43:40,403 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:40,405 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:40,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:40,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:40,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:40,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:40,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:40,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:40,409 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:43:40,409 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:43:40,409 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:40,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:40,410 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:40,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:40,410 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:43:40,411 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_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2023-11-24 21:43:40,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:40,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:40,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:40,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:40,926 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:40,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2023-11-24 21:43:44,275 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:44,620 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:44,621 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2023-11-24 21:43:44,634 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/f3e6b188a/1212692810f344e6ba3d45c61d05b6c5/FLAG9347d606d [2023-11-24 21:43:44,658 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/data/f3e6b188a/1212692810f344e6ba3d45c61d05b6c5 [2023-11-24 21:43:44,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:44,668 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:44,674 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:44,674 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:44,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:44,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:44" (1/1) ... [2023-11-24 21:43:44,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b50b2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:44, skipping insertion in model container [2023-11-24 21:43:44,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:44" (1/1) ... [2023-11-24 21:43:44,730 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:45,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:45,088 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:43:45,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:45,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:45,160 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:45,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:45,221 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:43:45,221 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:43:45,230 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:45,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45 WrapperNode [2023-11-24 21:43:45,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:45,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:45,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:45,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:45,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,306 INFO L138 Inliner]: procedures = 27, calls = 54, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-24 21:43:45,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:45,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:45,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:45,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:45,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,366 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 2, 2, 8, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:43:45,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:45,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:45,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:45,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:45,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (1/1) ... [2023-11-24 21:43:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:45,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:45,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:45,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:43:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:43:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:43:45,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-24 21:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:43:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:43:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-24 21:43:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:43:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:43:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:43:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:43:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:43:45,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:43:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:43:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:43:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:43:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:45,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:43:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:43:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:43:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:43:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-24 21:43:45,565 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:43:45,762 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:45,764 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:46,340 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:46,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:46,711 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:43:46,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:46 BoogieIcfgContainer [2023-11-24 21:43:46,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:46,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:46,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:46,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:46,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:44" (1/3) ... [2023-11-24 21:43:46,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6582ed65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:46, skipping insertion in model container [2023-11-24 21:43:46,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:45" (2/3) ... [2023-11-24 21:43:46,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6582ed65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:46, skipping insertion in model container [2023-11-24 21:43:46,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:46" (3/3) ... [2023-11-24 21:43:46,720 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-11-24 21:43:46,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:46,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-24 21:43:46,740 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:46,828 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 21:43:46,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 80 transitions, 181 flow [2023-11-24 21:43:46,923 INFO L124 PetriNetUnfolderBase]: 4/77 cut-off events. [2023-11-24 21:43:46,923 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:43:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 4/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-24 21:43:46,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 80 transitions, 181 flow [2023-11-24 21:43:46,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 76 transitions, 170 flow [2023-11-24 21:43:46,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:46,961 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;@42a78d4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:46,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-11-24 21:43:46,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:46,968 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:43:46,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:46,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:46,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:46,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:46,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash 550167, now seen corresponding path program 1 times [2023-11-24 21:43:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:46,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507100082] [2023-11-24 21:43:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:46,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:46,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:46,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:47,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:43:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:47,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:43:47,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:47,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:43:47,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:47,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:43:47,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:47,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:47,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:47,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507100082] [2023-11-24 21:43:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507100082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472127631] [2023-11-24 21:43:47,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:47,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:47,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-24 21:43:47,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:47,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-24 21:43:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:48,639 INFO L124 PetriNetUnfolderBase]: 1313/2776 cut-off events. [2023-11-24 21:43:48,640 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-24 21:43:48,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 2776 events. 1313/2776 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22082 event pairs, 890 based on Foata normal form. 1/1566 useless extension candidates. Maximal degree in co-relation 4581. Up to 1832 conditions per place. [2023-11-24 21:43:48,703 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 31 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-24 21:43:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 222 flow [2023-11-24 21:43:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-11-24 21:43:48,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2023-11-24 21:43:48,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-11-24 21:43:48,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-11-24 21:43:48,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:48,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-11-24 21:43:48,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,734 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 170 flow. Second operand 3 states and 159 transitions. [2023-11-24 21:43:48,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 222 flow [2023-11-24 21:43:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:43:48,749 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 148 flow [2023-11-24 21:43:48,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-11-24 21:43:48,755 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -11 predicate places. [2023-11-24 21:43:48,756 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 148 flow [2023-11-24 21:43:48,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:48,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:48,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:48,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash 550168, now seen corresponding path program 1 times [2023-11-24 21:43:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639330147] [2023-11-24 21:43:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:48,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:48,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:43:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:49,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:43:49,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:49,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:43:49,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:43:49,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:49,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:49,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:49,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639330147] [2023-11-24 21:43:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639330147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:49,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542130386] [2023-11-24 21:43:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:50,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-24 21:43:50,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:50,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-24 21:43:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:50,789 INFO L124 PetriNetUnfolderBase]: 1313/2778 cut-off events. [2023-11-24 21:43:50,789 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-24 21:43:50,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 2778 events. 1313/2778 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22029 event pairs, 890 based on Foata normal form. 1/1568 useless extension candidates. Maximal degree in co-relation 4692. Up to 1836 conditions per place. [2023-11-24 21:43:50,818 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 34 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-11-24 21:43:50,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 224 flow [2023-11-24 21:43:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-24 21:43:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-24 21:43:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-24 21:43:50,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-24 21:43:50,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:50,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-24 21:43:50,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,826 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 148 flow. Second operand 3 states and 158 transitions. [2023-11-24 21:43:50,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 224 flow [2023-11-24 21:43:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:50,829 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 158 flow [2023-11-24 21:43:50,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-11-24 21:43:50,830 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2023-11-24 21:43:50,830 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 158 flow [2023-11-24 21:43:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:50,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:43:50,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:51,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:51,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:51,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 528729222, now seen corresponding path program 1 times [2023-11-24 21:43:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:51,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219485255] [2023-11-24 21:43:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:51,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:51,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:51,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:43:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:51,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:43:51,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:51,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:43:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:43:51,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:43:51,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:43:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:51,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:43:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:51,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:52,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219485255] [2023-11-24 21:43:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219485255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:52,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:43:52,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:43:52,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046741042] [2023-11-24 21:43:52,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:43:52,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:43:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:43:53,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-24 21:43:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 158 flow. Second operand has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:53,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:53,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-24 21:43:53,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:54,438 INFO L124 PetriNetUnfolderBase]: 1316/2787 cut-off events. [2023-11-24 21:43:54,438 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-24 21:43:54,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2787 events. 1316/2787 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22056 event pairs, 890 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 4727. Up to 1839 conditions per place. [2023-11-24 21:43:54,464 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 34 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-24 21:43:54,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 280 flow [2023-11-24 21:43:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:43:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:43:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 408 transitions. [2023-11-24 21:43:54,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-24 21:43:54,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 408 transitions. [2023-11-24 21:43:54,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 408 transitions. [2023-11-24 21:43:54,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:54,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 408 transitions. [2023-11-24 21:43:54,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 45.333333333333336) internal successors, (408), 9 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,475 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 158 flow. Second operand 9 states and 408 transitions. [2023-11-24 21:43:54,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 280 flow [2023-11-24 21:43:54,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:54,478 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 230 flow [2023-11-24 21:43:54,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-11-24 21:43:54,479 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2023-11-24 21:43:54,479 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 230 flow [2023-11-24 21:43:54,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:54,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:54,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:54,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:54,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:54,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -789261409, now seen corresponding path program 1 times [2023-11-24 21:43:54,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921332499] [2023-11-24 21:43:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:54,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:54,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:54,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:54,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:43:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:54,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:43:54,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:54,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:43:54,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:43:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:54,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:55,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:55,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:55,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:43:55,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:55,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:43:55,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:55,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:43:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:55,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:55,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921332499] [2023-11-24 21:43:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921332499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632896198] [2023-11-24 21:43:55,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2023-11-24 21:43:55,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:55,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2023-11-24 21:43:55,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:55,638 INFO L124 PetriNetUnfolderBase]: 779/1691 cut-off events. [2023-11-24 21:43:55,638 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-24 21:43:55,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 1691 events. 779/1691 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12045 event pairs, 524 based on Foata normal form. 0/1097 useless extension candidates. Maximal degree in co-relation 2866. Up to 1099 conditions per place. [2023-11-24 21:43:55,656 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 35 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-24 21:43:55,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 300 flow [2023-11-24 21:43:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-11-24 21:43:55,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-11-24 21:43:55,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2023-11-24 21:43:55,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2023-11-24 21:43:55,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:55,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2023-11-24 21:43:55,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,662 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 230 flow. Second operand 4 states and 190 transitions. [2023-11-24 21:43:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 300 flow [2023-11-24 21:43:55,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 286 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:55,671 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 216 flow [2023-11-24 21:43:55,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2023-11-24 21:43:55,673 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-11-24 21:43:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 216 flow [2023-11-24 21:43:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:55,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:55,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 21:43:55,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:55,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:55,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash -789261408, now seen corresponding path program 1 times [2023-11-24 21:43:55,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:55,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235057971] [2023-11-24 21:43:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:55,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:55,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:55,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 21:43:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:55,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:43:55,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:56,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-24 21:43:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235057971] [2023-11-24 21:43:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235057971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:56,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:43:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-24 21:43:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47812449] [2023-11-24 21:43:56,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:43:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:43:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:57,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-24 21:43:57,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 41.25) internal successors, (330), 8 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:57,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-24 21:43:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:57,859 INFO L124 PetriNetUnfolderBase]: 598/1281 cut-off events. [2023-11-24 21:43:57,859 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:57,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1281 events. 598/1281 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8436 event pairs, 377 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2178. Up to 837 conditions per place. [2023-11-24 21:43:57,874 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 31 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-11-24 21:43:57,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 286 flow [2023-11-24 21:43:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 275 transitions. [2023-11-24 21:43:57,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2023-11-24 21:43:57,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 275 transitions. [2023-11-24 21:43:57,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 275 transitions. [2023-11-24 21:43:57,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:57,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 275 transitions. [2023-11-24 21:43:57,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.833333333333336) internal successors, (275), 6 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,881 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,881 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 216 flow. Second operand 6 states and 275 transitions. [2023-11-24 21:43:57,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 286 flow [2023-11-24 21:43:57,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:57,884 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 218 flow [2023-11-24 21:43:57,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2023-11-24 21:43:57,886 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-11-24 21:43:57,886 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 218 flow [2023-11-24 21:43:57,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.25) internal successors, (330), 8 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:57,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-24 21:43:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:58,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:58,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1302701213, now seen corresponding path program 1 times [2023-11-24 21:43:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235085945] [2023-11-24 21:43:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:58,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:58,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:58,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 21:43:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:58,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:58,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:58,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:58,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235085945] [2023-11-24 21:43:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235085945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:58,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:58,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98209627] [2023-11-24 21:43:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:58,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:58,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:58,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2023-11-24 21:43:58,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:58,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:58,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2023-11-24 21:43:58,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:58,490 INFO L124 PetriNetUnfolderBase]: 597/1281 cut-off events. [2023-11-24 21:43:58,490 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:58,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 1281 events. 597/1281 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8443 event pairs, 377 based on Foata normal form. 1/887 useless extension candidates. Maximal degree in co-relation 2185. Up to 850 conditions per place. [2023-11-24 21:43:58,501 INFO L140 encePairwiseOnDemand]: 78/80 looper letters, 39 selfloop transitions, 0 changer transitions 1/72 dead transitions. [2023-11-24 21:43:58,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 298 flow [2023-11-24 21:43:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-24 21:43:58,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2023-11-24 21:43:58,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-24 21:43:58,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-24 21:43:58,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:58,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-24 21:43:58,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:58,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:58,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:58,506 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 218 flow. Second operand 3 states and 147 transitions. [2023-11-24 21:43:58,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 298 flow [2023-11-24 21:43:58,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 292 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:58,509 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 212 flow [2023-11-24 21:43:58,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-11-24 21:43:58,511 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-11-24 21:43:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 212 flow [2023-11-24 21:43:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:58,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:58,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-24 21:43:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:58,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:43:58,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1729015819, now seen corresponding path program 1 times [2023-11-24 21:43:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:43:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497290832] [2023-11-24 21:43:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:43:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:43:58,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:43:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 21:43:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:58,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:43:58,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:58,944 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-24 21:43:58,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-24 21:43:59,037 INFO L349 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-24 21:43:59,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-24 21:43:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:59,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:59,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:43:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497290832] [2023-11-24 21:43:59,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497290832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:59,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096389301] [2023-11-24 21:43:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:43:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:59,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2023-11-24 21:43:59,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:59,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:59,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2023-11-24 21:43:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:59,980 INFO L124 PetriNetUnfolderBase]: 597/1229 cut-off events. [2023-11-24 21:43:59,980 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:59,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2164 conditions, 1229 events. 597/1229 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7823 event pairs, 377 based on Foata normal form. 73/959 useless extension candidates. Maximal degree in co-relation 2155. Up to 848 conditions per place. [2023-11-24 21:43:59,994 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 37 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-24 21:43:59,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 284 flow [2023-11-24 21:43:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-24 21:44:00,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2023-11-24 21:44:00,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-24 21:44:00,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-24 21:44:00,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:00,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-24 21:44:00,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,003 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 212 flow. Second operand 3 states and 146 transitions. [2023-11-24 21:44:00,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 284 flow [2023-11-24 21:44:00,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 69 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:00,007 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 208 flow [2023-11-24 21:44:00,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-11-24 21:44:00,008 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -5 predicate places. [2023-11-24 21:44:00,008 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 208 flow [2023-11-24 21:44:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:00,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:00,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:00,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:00,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:00,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1729015820, now seen corresponding path program 1 times [2023-11-24 21:44:00,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:00,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751134533] [2023-11-24 21:44:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:00,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:00,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 21:44:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:00,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:44:00,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,477 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-24 21:44:00,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2023-11-24 21:44:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-24 21:44:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:00,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-11-24 21:44:00,621 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-24 21:44:00,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-24 21:44:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:02,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:02,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:02,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751134533] [2023-11-24 21:44:02,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751134533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:02,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:02,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:44:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736570946] [2023-11-24 21:44:02,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:02,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:44:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:44:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:44:03,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-24 21:44:03,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 208 flow. Second operand has 10 states, 10 states have (on average 38.4) internal successors, (384), 10 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:03,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:03,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-24 21:44:03,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:05,749 INFO L124 PetriNetUnfolderBase]: 825/1446 cut-off events. [2023-11-24 21:44:05,749 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 21:44:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2682 conditions, 1446 events. 825/1446 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8398 event pairs, 533 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 2673. Up to 1145 conditions per place. [2023-11-24 21:44:05,763 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 36 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-11-24 21:44:05,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 67 transitions, 284 flow [2023-11-24 21:44:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2023-11-24 21:44:05,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2023-11-24 21:44:05,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 221 transitions. [2023-11-24 21:44:05,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 221 transitions. [2023-11-24 21:44:05,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:05,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 221 transitions. [2023-11-24 21:44:05,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,769 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,769 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 208 flow. Second operand 5 states and 221 transitions. [2023-11-24 21:44:05,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 67 transitions, 284 flow [2023-11-24 21:44:05,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 67 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:05,773 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 211 flow [2023-11-24 21:44:05,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2023-11-24 21:44:05,774 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -4 predicate places. [2023-11-24 21:44:05,774 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 211 flow [2023-11-24 21:44:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.4) internal successors, (384), 10 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:05,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:05,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:05,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:05,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -431959201, now seen corresponding path program 1 times [2023-11-24 21:44:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171460629] [2023-11-24 21:44:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:05,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:05,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:06,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-24 21:44:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:06,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:44:06,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:06,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:06,171 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:44:06,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:44:06,202 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:06,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-24 21:44:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:06,265 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:44:06,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-24 21:44:06,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:06,309 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:06,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:44:06,345 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:44:06,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-24 21:44:06,366 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:06,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-24 21:44:06,392 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:06,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-24 21:44:06,425 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:44:06,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-24 21:44:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:07,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:07,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:07,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171460629] [2023-11-24 21:44:07,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171460629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:07,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:07,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:07,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932383405] [2023-11-24 21:44:07,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:07,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:07,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:07,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-24 21:44:07,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:07,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:07,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-24 21:44:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:07,488 INFO L124 PetriNetUnfolderBase]: 627/1199 cut-off events. [2023-11-24 21:44:07,488 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:44:07,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 1199 events. 627/1199 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7245 event pairs, 398 based on Foata normal form. 0/927 useless extension candidates. Maximal degree in co-relation 2177. Up to 896 conditions per place. [2023-11-24 21:44:07,498 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 39 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-24 21:44:07,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 287 flow [2023-11-24 21:44:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-24 21:44:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2023-11-24 21:44:07,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-24 21:44:07,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-24 21:44:07,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:07,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-24 21:44:07,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:07,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:07,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:07,502 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 211 flow. Second operand 3 states and 142 transitions. [2023-11-24 21:44:07,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 287 flow [2023-11-24 21:44:07,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 281 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:44:07,505 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 203 flow [2023-11-24 21:44:07,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-24 21:44:07,506 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -7 predicate places. [2023-11-24 21:44:07,506 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 203 flow [2023-11-24 21:44:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:07,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:07,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:07,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:07,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash -431959200, now seen corresponding path program 1 times [2023-11-24 21:44:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172228678] [2023-11-24 21:44:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:07,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:07,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-24 21:44:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:07,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:44:07,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:07,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:07,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:44:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:07,943 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:44:07,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-24 21:44:07,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:44:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:07,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,047 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:08,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:08,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,119 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:08,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:44:08,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,235 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:08,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-24 21:44:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:44:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:08,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:44:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:09,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:09,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172228678] [2023-11-24 21:44:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172228678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:09,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:09,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:44:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626980956] [2023-11-24 21:44:09,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:09,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:44:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:44:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:44:11,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-24 21:44:11,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 203 flow. Second operand has 10 states, 10 states have (on average 38.8) internal successors, (388), 10 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-24 21:44:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:12,344 INFO L124 PetriNetUnfolderBase]: 627/1184 cut-off events. [2023-11-24 21:44:12,345 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:44:12,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1184 events. 627/1184 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7116 event pairs, 398 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 2161. Up to 892 conditions per place. [2023-11-24 21:44:12,355 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 36 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-11-24 21:44:12,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 279 flow [2023-11-24 21:44:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2023-11-24 21:44:12,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2023-11-24 21:44:12,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 221 transitions. [2023-11-24 21:44:12,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 221 transitions. [2023-11-24 21:44:12,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:12,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 221 transitions. [2023-11-24 21:44:12,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:12,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:12,363 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:12,363 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 203 flow. Second operand 5 states and 221 transitions. [2023-11-24 21:44:12,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 279 flow [2023-11-24 21:44:12,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:12,366 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 206 flow [2023-11-24 21:44:12,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-11-24 21:44:12,369 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-11-24 21:44:12,369 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 206 flow [2023-11-24 21:44:12,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.8) internal successors, (388), 10 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:12,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:12,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:44:12,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:12,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:12,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash -91451952, now seen corresponding path program 2 times [2023-11-24 21:44:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151568670] [2023-11-24 21:44:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:44:12,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:12,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:12,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:12,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-24 21:44:12,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:44:12,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:12,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:44:12,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:12,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:44:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 21:44:12,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:12,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:12,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:13,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:13,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:13,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:13,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:13,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:14,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151568670] [2023-11-24 21:44:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151568670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:14,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:14,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:44:14,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062415870] [2023-11-24 21:44:14,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:14,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:44:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:44:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:44:17,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 80 [2023-11-24 21:44:17,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 206 flow. Second operand has 14 states, 14 states have (on average 41.57142857142857) internal successors, (582), 14 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:17,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 80 [2023-11-24 21:44:17,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:22,101 INFO L124 PetriNetUnfolderBase]: 603/1166 cut-off events. [2023-11-24 21:44:22,101 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-24 21:44:22,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1166 events. 603/1166 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7019 event pairs, 377 based on Foata normal form. 6/910 useless extension candidates. Maximal degree in co-relation 2160. Up to 848 conditions per place. [2023-11-24 21:44:22,111 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 28 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2023-11-24 21:44:22,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 81 transitions, 434 flow [2023-11-24 21:44:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:44:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-24 21:44:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 903 transitions. [2023-11-24 21:44:22,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-11-24 21:44:22,118 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 903 transitions. [2023-11-24 21:44:22,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 903 transitions. [2023-11-24 21:44:22,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:22,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 903 transitions. [2023-11-24 21:44:22,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.0) internal successors, (903), 21 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:22,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:22,128 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:22,129 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 206 flow. Second operand 21 states and 903 transitions. [2023-11-24 21:44:22,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 81 transitions, 434 flow [2023-11-24 21:44:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:44:22,134 INFO L231 Difference]: Finished difference. Result has 99 places, 81 transitions, 402 flow [2023-11-24 21:44:22,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=402, PETRI_PLACES=99, PETRI_TRANSITIONS=81} [2023-11-24 21:44:22,135 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 17 predicate places. [2023-11-24 21:44:22,135 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 81 transitions, 402 flow [2023-11-24 21:44:22,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 41.57142857142857) internal successors, (582), 14 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:22,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:22,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:22,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-24 21:44:22,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:22,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:22,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash -773981210, now seen corresponding path program 1 times [2023-11-24 21:44:22,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:22,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866827492] [2023-11-24 21:44:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:22,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:22,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:22,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-24 21:44:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:22,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:44:22,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:22,525 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,559 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:44:22,582 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,608 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,633 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:44:22,652 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,682 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,711 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:44:22,733 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-24 21:44:22,765 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:44:22,800 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-24 21:44:22,830 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:22,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-24 21:44:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:23,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:23,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866827492] [2023-11-24 21:44:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866827492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:23,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:23,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:23,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306673755] [2023-11-24 21:44:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:23,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:23,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-24 21:44:23,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 81 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:23,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:23,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-24 21:44:23,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:23,427 INFO L124 PetriNetUnfolderBase]: 700/1258 cut-off events. [2023-11-24 21:44:23,427 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-24 21:44:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 1258 events. 700/1258 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7288 event pairs, 438 based on Foata normal form. 0/1015 useless extension candidates. Maximal degree in co-relation 2428. Up to 1001 conditions per place. [2023-11-24 21:44:23,435 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 57 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-24 21:44:23,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 79 transitions, 514 flow [2023-11-24 21:44:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-24 21:44:23,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2023-11-24 21:44:23,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-24 21:44:23,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-24 21:44:23,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:23,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-24 21:44:23,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:23,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:23,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:23,440 INFO L175 Difference]: Start difference. First operand has 99 places, 81 transitions, 402 flow. Second operand 3 states and 142 transitions. [2023-11-24 21:44:23,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 79 transitions, 514 flow [2023-11-24 21:44:23,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 79 transitions, 426 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-24 21:44:23,445 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 312 flow [2023-11-24 21:44:23,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2023-11-24 21:44:23,446 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2023-11-24 21:44:23,446 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 312 flow [2023-11-24 21:44:23,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:23,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:23,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:23,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:23,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:23,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-24 21:44:23,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash -773981209, now seen corresponding path program 1 times [2023-11-24 21:44:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:23,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113554138] [2023-11-24 21:44:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:23,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:23,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:23,652 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:44:23,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912eb5f4-8bff-460a-9890-5fb5dbc7b3c3/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-24 21:44:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:23,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:44:23,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:23,848 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:44:23,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-24 21:44:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:23,901 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:23,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:23,931 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:23,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:23,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:23,965 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:23,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,009 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,038 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,080 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,111 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,139 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-24 21:44:24,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,184 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,244 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-24 21:44:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:24,298 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:44:24,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 21:44:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:25,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:25,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113554138] [2023-11-24 21:44:25,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113554138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:25,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:25,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:44:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175427904] [2023-11-24 21:44:25,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:44:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:44:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:44:27,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2023-11-24 21:44:27,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 39.2) internal successors, (392), 10 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:27,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:27,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2023-11-24 21:44:27,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand