./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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_e00f2270-4036-4943-a586-4df9dff25919/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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:41,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:41,409 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:55:41,418 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:41,419 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:41,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:41,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:41,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:41,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:41,445 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:41,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:41,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:41,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:41,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:41,448 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:41,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:41,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:41,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:41,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:41,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:41,452 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:41,453 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:41,453 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:41,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:41,454 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:41,455 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:41,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:41,456 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:41,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:41,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:41,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:41,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:41,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:41,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:41,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:41,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:55:41,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:55:41,460 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:41,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:41,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:41,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:41,461 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_e00f2270-4036-4943-a586-4df9dff25919/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2023-11-24 21:55:41,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:41,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:41,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:41,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:41,785 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:41,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-24 21:55:45,060 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:45,252 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:45,253 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-24 21:55:45,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/f749f02a7/419cbdd2e13944449bac0125ca303cef/FLAGba441bddf [2023-11-24 21:55:45,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/f749f02a7/419cbdd2e13944449bac0125ca303cef [2023-11-24 21:55:45,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:45,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:45,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:45,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:45,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:45,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:45" (1/1) ... [2023-11-24 21:55:45,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ae7d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:45, skipping insertion in model container [2023-11-24 21:55:45,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:45" (1/1) ... [2023-11-24 21:55:45,332 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:45,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:45,572 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 21:55:45,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fef0ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:45, skipping insertion in model container [2023-11-24 21:55:45,573 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:45,574 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:55:45,577 INFO L158 Benchmark]: Toolchain (without parser) took 294.81ms. Allocated memory is still 138.4MB. Free memory was 92.6MB in the beginning and 82.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:55:45,578 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory was 108.2MB in the beginning and 108.2MB in the end (delta: 95.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:55:45,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.84ms. Allocated memory is still 138.4MB. Free memory was 92.2MB in the beginning and 82.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:55:45,582 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory was 108.2MB in the beginning and 108.2MB in the end (delta: 95.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.84ms. Allocated memory is still 138.4MB. Free memory was 92.2MB in the beginning and 82.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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_e00f2270-4036-4943-a586-4df9dff25919/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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:48,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:48,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:55:48,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:48,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:48,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:48,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:48,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:48,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:48,729 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:48,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:48,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:48,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:48,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:48,734 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:48,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:48,736 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:48,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:48,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:48,739 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:48,739 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:48,740 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:48,741 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:48,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:48,742 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:48,743 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:55:48,743 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:55:48,744 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:48,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:48,745 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:48,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:48,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:48,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:48,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:48,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:48,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:48,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:48,752 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:55:48,753 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:55:48,753 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:48,754 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:48,754 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:48,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:48,755 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:55:48,756 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_e00f2270-4036-4943-a586-4df9dff25919/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2023-11-24 21:55:49,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:49,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:49,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:49,352 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:49,352 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:49,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-24 21:55:52,838 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:53,171 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:53,172 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-24 21:55:53,181 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/065a69d09/93ac2b6a11a64118b0729635b4aed81c/FLAGdc3154093 [2023-11-24 21:55:53,197 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/data/065a69d09/93ac2b6a11a64118b0729635b4aed81c [2023-11-24 21:55:53,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:53,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:53,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:53,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:53,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:53,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,212 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@266d2a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53, skipping insertion in model container [2023-11-24 21:55:53,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:53,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:53,588 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:55:53,602 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:53,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:53,668 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:53,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:53,759 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:53,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53 WrapperNode [2023-11-24 21:55:53,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:53,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:53,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:53,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:53,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,865 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 169 [2023-11-24 21:55:53,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:53,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:53,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:53,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:53,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,939 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 7, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-24 21:55:53,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,972 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:53,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:54,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:54,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:54,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:54,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:54,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:54,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:54,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (1/1) ... [2023-11-24 21:55:54,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:54,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:54,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:54,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:55:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:55:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:55:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:55:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:55:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:55:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:55:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:55:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:55:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:55:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:55:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:55:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:55:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:55:54,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:55:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:55:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:55:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:55:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:55:54,163 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:55:54,385 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:54,388 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:55,005 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:55,404 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:55,405 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:55:55,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:55 BoogieIcfgContainer [2023-11-24 21:55:55,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:55,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:55,408 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:55,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:55,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:53" (1/3) ... [2023-11-24 21:55:55,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005da04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:55, skipping insertion in model container [2023-11-24 21:55:55,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:53" (2/3) ... [2023-11-24 21:55:55,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005da04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:55, skipping insertion in model container [2023-11-24 21:55:55,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:55" (3/3) ... [2023-11-24 21:55:55,419 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-11-24 21:55:55,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:55,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-24 21:55:55,446 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:55:55,532 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:55:55,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 126 flow [2023-11-24 21:55:55,645 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2023-11-24 21:55:55,645 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:55:55,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 3/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-24 21:55:55,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 56 transitions, 126 flow [2023-11-24 21:55:55,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 118 flow [2023-11-24 21:55:55,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:55,688 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;@2a23b1e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:55,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-24 21:55:55,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:55:55,698 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:55:55,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:55,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:55:55,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:55:55,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash 549272, now seen corresponding path program 1 times [2023-11-24 21:55:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562691470] [2023-11-24 21:55:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:55,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:55,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:55:55,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:55:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:55:55,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:56,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:55:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:56,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:55:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:56,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:56,066 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 11 treesize of output 1 [2023-11-24 21:55:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:56,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:55:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:56,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:55:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:56,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:56,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562691470] [2023-11-24 21:55:56,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562691470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:56,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5239113] [2023-11-24 21:55:56,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:56,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-24 21:55:56,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:56,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-24 21:55:56,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:56,533 INFO L124 PetriNetUnfolderBase]: 114/335 cut-off events. [2023-11-24 21:55:56,533 INFO L125 PetriNetUnfolderBase]: For 32/35 co-relation queries the response was YES. [2023-11-24 21:55:56,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 335 events. 114/335 cut-off events. For 32/35 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1782 event pairs, 86 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 484. Up to 197 conditions per place. [2023-11-24 21:55:56,540 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 21 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-24 21:55:56,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 158 flow [2023-11-24 21:55:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-24 21:55:56,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2023-11-24 21:55:56,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-24 21:55:56,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-24 21:55:56,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:56,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-24 21:55:56,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,569 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 118 flow. Second operand 3 states and 115 transitions. [2023-11-24 21:55:56,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 158 flow [2023-11-24 21:55:56,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:55:56,576 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 108 flow [2023-11-24 21:55:56,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-24 21:55:56,582 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-24 21:55:56,582 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 108 flow [2023-11-24 21:55:56,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:56,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:55:56,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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)] Ended with exit code 0 [2023-11-24 21:55:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:56,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:55:56,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash 549295, now seen corresponding path program 1 times [2023-11-24 21:55:56,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:56,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642861684] [2023-11-24 21:55:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:56,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:56,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:55:56,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:55:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:56,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:55:56,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:56,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:56,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642861684] [2023-11-24 21:55:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642861684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:56,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493372317] [2023-11-24 21:55:56,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:56,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-24 21:55:56,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:56,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:56,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-24 21:55:56,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:57,150 INFO L124 PetriNetUnfolderBase]: 114/338 cut-off events. [2023-11-24 21:55:57,150 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-11-24 21:55:57,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 338 events. 114/338 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1777 event pairs, 86 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 530. Up to 200 conditions per place. [2023-11-24 21:55:57,155 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 23 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-24 21:55:57,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 162 flow [2023-11-24 21:55:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-11-24 21:55:57,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-11-24 21:55:57,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-11-24 21:55:57,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-11-24 21:55:57,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:57,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-11-24 21:55:57,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:57,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:57,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:57,161 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 108 flow. Second operand 3 states and 119 transitions. [2023-11-24 21:55:57,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 162 flow [2023-11-24 21:55:57,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:57,164 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 116 flow [2023-11-24 21:55:57,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-24 21:55:57,165 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-24 21:55:57,166 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 116 flow [2023-11-24 21:55:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:57,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:57,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:55:57,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:55:57,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:57,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:55:57,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash 549273, now seen corresponding path program 1 times [2023-11-24 21:55:57,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:57,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135018955] [2023-11-24 21:55:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:57,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:55:57,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:55:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:55:57,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:57,468 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 21:55:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:57,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:57,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:55:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:57,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:57,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:55:57,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:57,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:55:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:57,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:57,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:57,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135018955] [2023-11-24 21:55:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135018955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:57,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:57,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:57,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430927296] [2023-11-24 21:55:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:57,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-24 21:55:57,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 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 21:55:57,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:57,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-24 21:55:57,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:58,271 INFO L124 PetriNetUnfolderBase]: 114/337 cut-off events. [2023-11-24 21:55:58,271 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-11-24 21:55:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 337 events. 114/337 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1778 event pairs, 86 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 540. Up to 201 conditions per place. [2023-11-24 21:55:58,290 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 24 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-24 21:55:58,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 170 flow [2023-11-24 21:55:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-24 21:55:58,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2023-11-24 21:55:58,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-24 21:55:58,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-24 21:55:58,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:58,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-24 21:55:58,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:58,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:58,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:58,296 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 116 flow. Second operand 3 states and 117 transitions. [2023-11-24 21:55:58,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 170 flow [2023-11-24 21:55:58,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:58,299 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 122 flow [2023-11-24 21:55:58,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-24 21:55:58,300 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-24 21:55:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 122 flow [2023-11-24 21:55:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 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 21:55:58,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:58,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:55:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:58,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:55:58,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 527869193, now seen corresponding path program 1 times [2023-11-24 21:55:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:58,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373345147] [2023-11-24 21:55:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:58,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:58,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:55:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:55:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:55:58,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:58,606 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 21:55:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:58,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:58,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:55:58,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:58,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:55:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:58,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:55:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:58,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:55:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:58,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:59,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:59,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373345147] [2023-11-24 21:55:59,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373345147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:59,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:55:59,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:55:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576224288] [2023-11-24 21:55:59,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:55:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:55:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:56:00,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-24 21:56:00,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 21:56:00,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:00,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-24 21:56:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:01,481 INFO L124 PetriNetUnfolderBase]: 117/346 cut-off events. [2023-11-24 21:56:01,482 INFO L125 PetriNetUnfolderBase]: For 10/13 co-relation queries the response was YES. [2023-11-24 21:56:01,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 346 events. 117/346 cut-off events. For 10/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1813 event pairs, 86 based on Foata normal form. 3/247 useless extension candidates. Maximal degree in co-relation 565. Up to 204 conditions per place. [2023-11-24 21:56:01,486 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 24 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-11-24 21:56:01,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 224 flow [2023-11-24 21:56:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:56:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:56:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2023-11-24 21:56:01,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 21:56:01,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 308 transitions. [2023-11-24 21:56:01,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 308 transitions. [2023-11-24 21:56:01,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:01,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 308 transitions. [2023-11-24 21:56:01,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 21:56:01,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 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 21:56:01,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 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 21:56:01,503 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 122 flow. Second operand 9 states and 308 transitions. [2023-11-24 21:56:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 224 flow [2023-11-24 21:56:01,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:01,507 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 192 flow [2023-11-24 21:56:01,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-11-24 21:56:01,508 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-11-24 21:56:01,508 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 192 flow [2023-11-24 21:56:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 21:56:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:01,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:01,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:01,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:01,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:01,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 527869215, now seen corresponding path program 1 times [2023-11-24 21:56:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694047804] [2023-11-24 21:56:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:01,714 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 21:56:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:01,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:01,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:56:01,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:01,841 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:56:01,841 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 21:56:01,884 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:56:01,884 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 21:56:02,039 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 21:56:02,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:02,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694047804] [2023-11-24 21:56:02,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694047804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:02,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:02,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385725305] [2023-11-24 21:56:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:02,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:02,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:02,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-24 21:56:02,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:56:02,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:02,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-24 21:56:02,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:02,333 INFO L124 PetriNetUnfolderBase]: 181/467 cut-off events. [2023-11-24 21:56:02,333 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 21:56:02,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 467 events. 181/467 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2464 event pairs, 138 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 795. Up to 307 conditions per place. [2023-11-24 21:56:02,338 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 35 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-24 21:56:02,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 260 flow [2023-11-24 21:56:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-24 21:56:02,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-24 21:56:02,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-24 21:56:02,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-24 21:56:02,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:02,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-24 21:56:02,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:56:02,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:56:02,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:56:02,343 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 192 flow. Second operand 3 states and 108 transitions. [2023-11-24 21:56:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 260 flow [2023-11-24 21:56:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 240 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:02,347 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 170 flow [2023-11-24 21:56:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-24 21:56:02,348 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-24 21:56:02,348 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 170 flow [2023-11-24 21:56:02,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:56:02,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:02,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:02,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:02,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:02,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash 527869216, now seen corresponding path program 1 times [2023-11-24 21:56:02,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:02,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625234440] [2023-11-24 21:56:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:02,553 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 21:56:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:02,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:02,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:56:02,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:02,720 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:56:02,720 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 21:56:02,743 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 21:56:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:02,778 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 21:56:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:02,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:56:03,205 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 21:56:03,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:03,696 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 21:56:03,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:03,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625234440] [2023-11-24 21:56:03,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625234440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:03,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:03,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:56:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302640216] [2023-11-24 21:56:03,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:56:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:56:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:56:04,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-24 21:56:04,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-24 21:56:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:05,646 INFO L124 PetriNetUnfolderBase]: 181/458 cut-off events. [2023-11-24 21:56:05,646 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 21:56:05,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 458 events. 181/458 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2373 event pairs, 138 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 790. Up to 303 conditions per place. [2023-11-24 21:56:05,651 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-11-24 21:56:05,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 238 flow [2023-11-24 21:56:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:56:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:56:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-24 21:56:05,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2023-11-24 21:56:05,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-24 21:56:05,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-24 21:56:05,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:05,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-24 21:56:05,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 21:56:05,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 21:56:05,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 21:56:05,657 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 170 flow. Second operand 5 states and 167 transitions. [2023-11-24 21:56:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 238 flow [2023-11-24 21:56:05,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:56:05,660 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 173 flow [2023-11-24 21:56:05,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-24 21:56:05,662 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-24 21:56:05,662 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 173 flow [2023-11-24 21:56:05,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:05,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:05,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:05,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:05,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:05,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1877059222, now seen corresponding path program 1 times [2023-11-24 21:56:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:05,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547994596] [2023-11-24 21:56:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:05,867 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 21:56:05,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:05,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:05,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:56:05,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:06,026 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:56:06,027 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 21:56:06,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:06,086 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:56:06,087 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 21:56:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:06,120 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-24 21:56:06,120 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 21:56:06,823 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 21:56:06,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:07,232 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 21:56:07,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:07,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547994596] [2023-11-24 21:56:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547994596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:07,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:56:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945407574] [2023-11-24 21:56:07,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:56:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:56:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:56:08,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-24 21:56:08,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 173 flow. Second operand has 10 states, 10 states have (on average 28.4) internal successors, (284), 10 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 21:56:08,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:08,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-24 21:56:08,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:09,318 INFO L124 PetriNetUnfolderBase]: 129/356 cut-off events. [2023-11-24 21:56:09,319 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:56:09,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 356 events. 129/356 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1750 event pairs, 96 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 618. Up to 230 conditions per place. [2023-11-24 21:56:09,322 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-11-24 21:56:09,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 241 flow [2023-11-24 21:56:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:56:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:56:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-24 21:56:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2023-11-24 21:56:09,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-24 21:56:09,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-24 21:56:09,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:09,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-24 21:56:09,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 21:56:09,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 21:56:09,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 21:56:09,327 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 173 flow. Second operand 5 states and 167 transitions. [2023-11-24 21:56:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 241 flow [2023-11-24 21:56:09,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:56:09,330 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 171 flow [2023-11-24 21:56:09,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-24 21:56:09,331 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-24 21:56:09,331 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 171 flow [2023-11-24 21:56:09,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.4) internal successors, (284), 10 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 21:56:09,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:09,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:09,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:09,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:09,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1877059221, now seen corresponding path program 1 times [2023-11-24 21:56:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320886206] [2023-11-24 21:56:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:09,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:09,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:09,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:09,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:56:09,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:09,661 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:56:09,661 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 21:56:09,695 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:56:09,695 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 21:56:09,726 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:56:09,727 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 21:56:09,875 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 21:56:09,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:09,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320886206] [2023-11-24 21:56:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320886206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957104352] [2023-11-24 21:56:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:09,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:09,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:09,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-24 21:56:09,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 21:56:09,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:09,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-24 21:56:09,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:10,126 INFO L124 PetriNetUnfolderBase]: 129/353 cut-off events. [2023-11-24 21:56:10,126 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:56:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 353 events. 129/353 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1730 event pairs, 96 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 617. Up to 234 conditions per place. [2023-11-24 21:56:10,129 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 35 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-24 21:56:10,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 239 flow [2023-11-24 21:56:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-24 21:56:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-24 21:56:10,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-24 21:56:10,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-24 21:56:10,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:10,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-24 21:56:10,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:56:10,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:56:10,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:56:10,133 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 171 flow. Second operand 3 states and 108 transitions. [2023-11-24 21:56:10,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 239 flow [2023-11-24 21:56:10,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:56:10,136 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 163 flow [2023-11-24 21:56:10,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-11-24 21:56:10,137 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-24 21:56:10,137 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 163 flow [2023-11-24 21:56:10,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 21:56:10,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:10,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:10,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:10,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:10,348 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:10,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1940660475, now seen corresponding path program 1 times [2023-11-24 21:56:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:10,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54945960] [2023-11-24 21:56:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:10,349 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 21:56:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:10,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:10,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:56:10,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:10,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-24 21:56:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:10,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:56:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:10,465 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 21:56:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:10,470 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 21:56:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:10,477 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 21:56:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:10,483 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 21:56:10,512 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 21:56:10,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:10,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:10,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54945960] [2023-11-24 21:56:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54945960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:10,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000796833] [2023-11-24 21:56:10,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:10,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2023-11-24 21:56:10,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:56:10,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:10,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2023-11-24 21:56:10,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:10,840 INFO L124 PetriNetUnfolderBase]: 117/274 cut-off events. [2023-11-24 21:56:10,840 INFO L125 PetriNetUnfolderBase]: For 15/18 co-relation queries the response was YES. [2023-11-24 21:56:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 274 events. 117/274 cut-off events. For 15/18 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1108 event pairs, 86 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 513. Up to 199 conditions per place. [2023-11-24 21:56:10,843 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 29 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-24 21:56:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 219 flow [2023-11-24 21:56:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:56:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2023-11-24 21:56:10,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580357142857143 [2023-11-24 21:56:10,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 125 transitions. [2023-11-24 21:56:10,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 125 transitions. [2023-11-24 21:56:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:10,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 125 transitions. [2023-11-24 21:56:10,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:56:10,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:10,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:10,848 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 163 flow. Second operand 4 states and 125 transitions. [2023-11-24 21:56:10,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 219 flow [2023-11-24 21:56:10,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:56:10,850 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 160 flow [2023-11-24 21:56:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-24 21:56:10,851 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-24 21:56:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 160 flow [2023-11-24 21:56:10,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:56:10,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:10,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:10,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:11,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:11,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:11,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1940660474, now seen corresponding path program 1 times [2023-11-24 21:56:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576792448] [2023-11-24 21:56:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:11,056 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 21:56:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:11,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:11,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:56:11,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:11,265 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 21:56:11,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:11,490 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 35 treesize of output 31 [2023-11-24 21:56:11,622 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 21:56:11,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:11,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576792448] [2023-11-24 21:56:11,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576792448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:11,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:11,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-24 21:56:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196759419] [2023-11-24 21:56:11,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:56:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:56:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:56:13,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-24 21:56:13,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 21:56:13,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:13,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-24 21:56:13,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:13,760 INFO L124 PetriNetUnfolderBase]: 229/482 cut-off events. [2023-11-24 21:56:13,760 INFO L125 PetriNetUnfolderBase]: For 16/19 co-relation queries the response was YES. [2023-11-24 21:56:13,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 482 events. 229/482 cut-off events. For 16/19 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2257 event pairs, 86 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 923. Up to 213 conditions per place. [2023-11-24 21:56:13,764 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 44 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-24 21:56:13,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 301 flow [2023-11-24 21:56:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:56:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:56:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2023-11-24 21:56:13,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755952380952381 [2023-11-24 21:56:13,767 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 227 transitions. [2023-11-24 21:56:13,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 227 transitions. [2023-11-24 21:56:13,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:13,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 227 transitions. [2023-11-24 21:56:13,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 21:56:13,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 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 21:56:13,770 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 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 21:56:13,770 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 160 flow. Second operand 6 states and 227 transitions. [2023-11-24 21:56:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 301 flow [2023-11-24 21:56:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:13,773 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 181 flow [2023-11-24 21:56:13,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-24 21:56:13,774 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-24 21:56:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 181 flow [2023-11-24 21:56:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 21:56:13,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:13,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:13,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:13,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:13,982 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:13,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash -958890294, now seen corresponding path program 1 times [2023-11-24 21:56:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804542055] [2023-11-24 21:56:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:13,984 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 21:56:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:13,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:14,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:14,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:56:14,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:14,128 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 21:56:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:14,140 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 21:56:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:14,161 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 21:56:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:14,174 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 21:56:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:14,187 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 21:56:14,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:14,196 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 21:56:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:56:14,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:56:15,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:15,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804542055] [2023-11-24 21:56:15,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804542055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:15,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:15,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:56:15,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411745139] [2023-11-24 21:56:15,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:15,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:56:15,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:56:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:56:20,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 56 [2023-11-24 21:56:20,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 181 flow. Second operand has 11 states, 11 states have (on average 30.818181818181817) internal successors, (339), 11 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 21:56:20,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:20,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 56 [2023-11-24 21:56:20,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:23,022 INFO L124 PetriNetUnfolderBase]: 625/1373 cut-off events. [2023-11-24 21:56:23,023 INFO L125 PetriNetUnfolderBase]: For 92/108 co-relation queries the response was YES. [2023-11-24 21:56:23,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1373 events. 625/1373 cut-off events. For 92/108 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8246 event pairs, 423 based on Foata normal form. 0/1192 useless extension candidates. Maximal degree in co-relation 2707. Up to 393 conditions per place. [2023-11-24 21:56:23,035 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 83 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2023-11-24 21:56:23,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 523 flow [2023-11-24 21:56:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:56:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:56:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 387 transitions. [2023-11-24 21:56:23,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6910714285714286 [2023-11-24 21:56:23,039 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 387 transitions. [2023-11-24 21:56:23,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 387 transitions. [2023-11-24 21:56:23,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:23,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 387 transitions. [2023-11-24 21:56:23,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.7) internal successors, (387), 10 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:23,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 21:56:23,043 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 21:56:23,043 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 181 flow. Second operand 10 states and 387 transitions. [2023-11-24 21:56:23,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 523 flow [2023-11-24 21:56:23,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 514 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:56:23,047 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 242 flow [2023-11-24 21:56:23,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=242, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-11-24 21:56:23,048 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-24 21:56:23,048 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 242 flow [2023-11-24 21:56:23,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.818181818181817) internal successors, (339), 11 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 21:56:23,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:23,049 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:56:23,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:23,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:23,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1179305817, now seen corresponding path program 2 times [2023-11-24 21:56:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067437728] [2023-11-24 21:56:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:56:23,253 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 21:56:23,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:23,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:23,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:23,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:56:23,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:56:23,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:56:23,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:23,402 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 21:56:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:23,418 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 21:56:23,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:23,446 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 21:56:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:23,457 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 21:56:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:23,467 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 21:56:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:23,479 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 21:56:23,851 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 21:56:23,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:24,887 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 21:56:24,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:24,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067437728] [2023-11-24 21:56:24,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067437728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:24,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:24,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:56:24,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066339901] [2023-11-24 21:56:24,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:24,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:56:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:56:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:56:28,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-24 21:56:28,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 242 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 21:56:28,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:28,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-24 21:56:28,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:32,838 INFO L124 PetriNetUnfolderBase]: 605/1357 cut-off events. [2023-11-24 21:56:32,838 INFO L125 PetriNetUnfolderBase]: For 482/494 co-relation queries the response was YES. [2023-11-24 21:56:32,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3001 conditions, 1357 events. 605/1357 cut-off events. For 482/494 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8343 event pairs, 495 based on Foata normal form. 6/1304 useless extension candidates. Maximal degree in co-relation 2984. Up to 1050 conditions per place. [2023-11-24 21:56:32,853 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 31 selfloop transitions, 29 changer transitions 0/72 dead transitions. [2023-11-24 21:56:32,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 482 flow [2023-11-24 21:56:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:56:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-24 21:56:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 689 transitions. [2023-11-24 21:56:32,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858843537414966 [2023-11-24 21:56:32,861 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 689 transitions. [2023-11-24 21:56:32,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 689 transitions. [2023-11-24 21:56:32,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:32,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 689 transitions. [2023-11-24 21:56:32,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 32.80952380952381) internal successors, (689), 21 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 21:56:32,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 56.0) internal successors, (1232), 22 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 21:56:32,873 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 56.0) internal successors, (1232), 22 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 21:56:32,873 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 242 flow. Second operand 21 states and 689 transitions. [2023-11-24 21:56:32,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 482 flow [2023-11-24 21:56:32,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 72 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:56:32,881 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 442 flow [2023-11-24 21:56:32,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=442, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-11-24 21:56:32,882 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2023-11-24 21:56:32,882 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 442 flow [2023-11-24 21:56:32,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 21:56:32,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:32,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:32,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:33,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:33,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:33,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1009490909, now seen corresponding path program 1 times [2023-11-24 21:56:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:33,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260266834] [2023-11-24 21:56:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:33,088 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 21:56:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:33,089 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:33,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:33,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:56:33,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:33,333 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 21:56:33,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:33,586 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 35 treesize of output 31 [2023-11-24 21:56:33,725 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 21:56:33,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260266834] [2023-11-24 21:56:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260266834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:33,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-24 21:56:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499478293] [2023-11-24 21:56:33,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:56:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:56:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:56:34,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2023-11-24 21:56:34,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 21:56:34,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:34,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2023-11-24 21:56:34,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:35,793 INFO L124 PetriNetUnfolderBase]: 1157/2103 cut-off events. [2023-11-24 21:56:35,793 INFO L125 PetriNetUnfolderBase]: For 1097/1131 co-relation queries the response was YES. [2023-11-24 21:56:35,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 2103 events. 1157/2103 cut-off events. For 1097/1131 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11498 event pairs, 243 based on Foata normal form. 4/1760 useless extension candidates. Maximal degree in co-relation 5046. Up to 1465 conditions per place. [2023-11-24 21:56:35,813 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 68 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2023-11-24 21:56:35,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 680 flow [2023-11-24 21:56:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:56:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:56:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2023-11-24 21:56:35,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2023-11-24 21:56:35,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 201 transitions. [2023-11-24 21:56:35,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 201 transitions. [2023-11-24 21:56:35,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:35,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 201 transitions. [2023-11-24 21:56:35,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:56:35,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 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 21:56:35,819 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 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 21:56:35,819 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 442 flow. Second operand 6 states and 201 transitions. [2023-11-24 21:56:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 680 flow [2023-11-24 21:56:35,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 616 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-11-24 21:56:35,827 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 423 flow [2023-11-24 21:56:35,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-11-24 21:56:35,829 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-24 21:56:35,830 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 423 flow [2023-11-24 21:56:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 21:56:35,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:35,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:36,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:36,034 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:56:36,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1229446508, now seen corresponding path program 1 times [2023-11-24 21:56:36,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:36,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151578342] [2023-11-24 21:56:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:36,035 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 21:56:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:36,037 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 21:56:36,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00f2270-4036-4943-a586-4df9dff25919/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 (15)] Waiting until timeout for monitored process [2023-11-24 21:56:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:36,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:56:36,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:36,193 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 21:56:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:36,209 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 21:56:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:36,240 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 21:56:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:36,254 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 21:56:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:36,264 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 21:56:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:36,276 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 21:56:36,570 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 21:56:36,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:37,704 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 21:56:37,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151578342] [2023-11-24 21:56:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151578342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:37,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:56:37,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:56:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552421223] [2023-11-24 21:56:37,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:56:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:56:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110