./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB --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 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:01:23,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:01:23,442 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:01:23,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:01:23,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:01:23,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:01:23,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:01:23,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:01:23,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:01:23,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:01:23,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:01:23,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:01:23,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:01:23,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:01:23,477 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:01:23,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:01:23,478 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:01:23,479 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:01:23,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:01:23,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:01:23,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:01:23,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:01:23,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:01:23,482 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2024-11-28 03:01:23,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:01:23,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:01:23,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:01:23,891 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:01:23,892 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:01:23,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2024-11-28 03:01:27,462 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/787a5d477/06266703e03e4aed8d78e7a0f5aa1e48/FLAG13f4fd68b [2024-11-28 03:01:27,946 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:01:27,947 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2024-11-28 03:01:27,980 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/787a5d477/06266703e03e4aed8d78e7a0f5aa1e48/FLAG13f4fd68b [2024-11-28 03:01:28,006 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/787a5d477/06266703e03e4aed8d78e7a0f5aa1e48 [2024-11-28 03:01:28,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:01:28,012 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:01:28,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:01:28,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:01:28,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:01:28,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:28" (1/1) ... [2024-11-28 03:01:28,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b6df6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:28, skipping insertion in model container [2024-11-28 03:01:28,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:28" (1/1) ... [2024-11-28 03:01:28,092 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:01:28,661 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:28,662 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:28,662 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:28,664 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:28,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:01:28,757 ERROR L321 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) [2024-11-28 03:01:28,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f6e6444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:28, skipping insertion in model container [2024-11-28 03:01:28,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:01:28,763 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 03:01:28,768 INFO L158 Benchmark]: Toolchain (without parser) took 752.31ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 73.7MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:01:28,768 INFO L158 Benchmark]: CDTParser took 2.51ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:01:28,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 749.21ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.7MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:01:28,770 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.51ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 749.21ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.7MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB --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 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:01:31,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:01:32,074 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 03:01:32,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:01:32,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:01:32,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:01:32,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:01:32,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:01:32,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:01:32,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:01:32,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:01:32,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:01:32,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:01:32,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:01:32,130 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:01:32,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:01:32,130 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:01:32,130 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:01:32,131 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:01:32,132 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:01:32,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:01:32,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:01:32,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:01:32,133 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:01:32,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:01:32,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:01:32,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:01:32,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:01:32,134 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2024-11-28 03:01:32,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:01:32,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:01:32,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:01:32,591 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:01:32,595 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:01:32,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2024-11-28 03:01:36,589 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/9d386e80f/71744d3e41d24ea8806bcf3b16665105/FLAG3ae33d227 [2024-11-28 03:01:37,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:01:37,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2024-11-28 03:01:37,051 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/9d386e80f/71744d3e41d24ea8806bcf3b16665105/FLAG3ae33d227 [2024-11-28 03:01:37,080 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/data/9d386e80f/71744d3e41d24ea8806bcf3b16665105 [2024-11-28 03:01:37,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:01:37,087 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:01:37,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:01:37,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:01:37,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:01:37,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:37" (1/1) ... [2024-11-28 03:01:37,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ba79ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:37, skipping insertion in model container [2024-11-28 03:01:37,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:01:37" (1/1) ... [2024-11-28 03:01:37,180 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:01:37,877 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:37,877 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:37,878 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:37,878 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:37,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:01:37,967 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 03:01:37,981 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:01:38,064 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,064 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,065 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,065 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:01:38,122 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:01:38,176 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,177 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,177 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,178 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 03:01:38,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:01:38,282 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:01:38,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38 WrapperNode [2024-11-28 03:01:38,283 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:01:38,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:01:38,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:01:38,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:01:38,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,362 INFO L138 Inliner]: procedures = 284, calls = 136, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 302 [2024-11-28 03:01:38,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:01:38,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:01:38,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:01:38,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:01:38,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,452 INFO L175 MemorySlicer]: Split 110 memory accesses to 4 slices as follows [2, 5, 2, 101]. 92 percent of accesses are in the largest equivalence class. The 87 initializations are split as follows [2, 5, 0, 80]. The 13 writes are split as follows [0, 0, 1, 12]. [2024-11-28 03:01:38,452 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,481 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:01:38,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:01:38,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:01:38,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:01:38,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (1/1) ... [2024-11-28 03:01:38,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:01:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:38,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:01:38,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:01:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 03:01:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 03:01:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-28 03:01:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-28 03:01:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-28 03:01:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 03:01:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-28 03:01:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-28 03:01:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 03:01:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-28 03:01:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-28 03:01:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-28 03:01:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:01:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:01:38,627 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:01:38,948 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:01:38,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:01:40,469 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:01:40,470 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:01:43,512 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:01:43,512 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-28 03:01:43,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:01:43 BoogieIcfgContainer [2024-11-28 03:01:43,513 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:01:43,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:01:43,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:01:43,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:01:43,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:01:37" (1/3) ... [2024-11-28 03:01:43,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c8540b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:01:43, skipping insertion in model container [2024-11-28 03:01:43,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:01:38" (2/3) ... [2024-11-28 03:01:43,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c8540b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:01:43, skipping insertion in model container [2024-11-28 03:01:43,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:01:43" (3/3) ... [2024-11-28 03:01:43,528 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2024-11-28 03:01:43,553 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:01:43,555 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing.i that has 2 procedures, 115 locations, 1 initial locations, 11 loop locations, and 48 error locations. [2024-11-28 03:01:43,556 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:01:43,700 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-28 03:01:43,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 273 flow [2024-11-28 03:01:43,874 INFO L124 PetriNetUnfolderBase]: 18/145 cut-off events. [2024-11-28 03:01:43,877 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 03:01:43,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 18/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 536 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2024-11-28 03:01:43,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 133 transitions, 273 flow [2024-11-28 03:01:43,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 133 transitions, 273 flow [2024-11-28 03:01:43,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:01:43,938 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@27a15abb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:01:43,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-28 03:01:43,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:01:43,963 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-28 03:01:43,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:01:43,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:43,966 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:01:43,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:43,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash 858872, now seen corresponding path program 1 times [2024-11-28 03:01:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315952757] [2024-11-28 03:01:43,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:44,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:44,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:01:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:44,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:01:44,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:44,689 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:44,689 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:44,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315952757] [2024-11-28 03:01:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315952757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:44,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:44,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:01:44,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927284423] [2024-11-28 03:01:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:44,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:01:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:44,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:01:44,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:01:45,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-28 03:01:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-28 03:01:45,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:45,939 INFO L124 PetriNetUnfolderBase]: 125/490 cut-off events. [2024-11-28 03:01:45,939 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-28 03:01:45,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 490 events. 125/490 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2693 event pairs, 64 based on Foata normal form. 52/431 useless extension candidates. Maximal degree in co-relation 675. Up to 177 conditions per place. [2024-11-28 03:01:45,949 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 66 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-11-28 03:01:45,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 425 flow [2024-11-28 03:01:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:01:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:01:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2024-11-28 03:01:45,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7048872180451128 [2024-11-28 03:01:45,980 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 273 flow. Second operand 4 states and 375 transitions. [2024-11-28 03:01:45,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 425 flow [2024-11-28 03:01:45,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:01:46,003 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 253 flow [2024-11-28 03:01:46,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2024-11-28 03:01:46,012 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-28 03:01:46,013 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 253 flow [2024-11-28 03:01:46,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:46,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:46,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:01:46,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:01:46,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:46,218 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:46,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash 858823, now seen corresponding path program 1 times [2024-11-28 03:01:46,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386222118] [2024-11-28 03:01:46,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:46,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:46,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:46,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:46,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:01:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:46,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 03:01:46,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:46,665 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:46,665 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386222118] [2024-11-28 03:01:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386222118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:46,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:46,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:01:46,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517418711] [2024-11-28 03:01:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:46,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:01:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:46,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:01:46,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:01:46,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:01:46,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:46,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:46,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:01:46,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:47,235 INFO L124 PetriNetUnfolderBase]: 127/547 cut-off events. [2024-11-28 03:01:47,236 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2024-11-28 03:01:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 547 events. 127/547 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2985 event pairs, 105 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 743. Up to 269 conditions per place. [2024-11-28 03:01:47,249 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-11-28 03:01:47,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 124 transitions, 379 flow [2024-11-28 03:01:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:01:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:01:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-28 03:01:47,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7042606516290727 [2024-11-28 03:01:47,256 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 3 states and 281 transitions. [2024-11-28 03:01:47,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 124 transitions, 379 flow [2024-11-28 03:01:47,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:01:47,263 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 257 flow [2024-11-28 03:01:47,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2024-11-28 03:01:47,265 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-28 03:01:47,265 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 257 flow [2024-11-28 03:01:47,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:47,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:47,266 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:01:47,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:01:47,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:47,467 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:47,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 858873, now seen corresponding path program 1 times [2024-11-28 03:01:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:47,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699608037] [2024-11-28 03:01:47,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:47,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:47,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:47,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:47,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:01:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:47,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:01:47,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:48,068 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:48,068 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699608037] [2024-11-28 03:01:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699608037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:48,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:01:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367454051] [2024-11-28 03:01:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:48,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:01:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:48,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:01:48,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:01:48,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2024-11-28 03:01:48,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:48,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:48,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2024-11-28 03:01:48,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:49,189 INFO L124 PetriNetUnfolderBase]: 128/547 cut-off events. [2024-11-28 03:01:49,189 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2024-11-28 03:01:49,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 547 events. 128/547 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2988 event pairs, 105 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 816. Up to 282 conditions per place. [2024-11-28 03:01:49,198 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 48 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-28 03:01:49,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 121 transitions, 376 flow [2024-11-28 03:01:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:01:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:01:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-11-28 03:01:49,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-28 03:01:49,201 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 257 flow. Second operand 4 states and 342 transitions. [2024-11-28 03:01:49,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 121 transitions, 376 flow [2024-11-28 03:01:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 121 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:01:49,212 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 296 flow [2024-11-28 03:01:49,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2024-11-28 03:01:49,214 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-11-28 03:01:49,214 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 296 flow [2024-11-28 03:01:49,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:49,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:49,215 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:01:49,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:49,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:49,415 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:49,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash -182322699, now seen corresponding path program 1 times [2024-11-28 03:01:49,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:49,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227804209] [2024-11-28 03:01:49,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:49,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:01:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:49,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:01:49,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:49,917 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 [2024-11-28 03:01:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:49,927 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:49,928 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227804209] [2024-11-28 03:01:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227804209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:49,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:01:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450389295] [2024-11-28 03:01:49,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:49,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:01:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:49,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:01:49,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:01:50,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-28 03:01:50,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:50,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:50,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-28 03:01:50,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:50,542 INFO L124 PetriNetUnfolderBase]: 128/545 cut-off events. [2024-11-28 03:01:50,542 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-11-28 03:01:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 545 events. 128/545 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2972 event pairs, 105 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 819. Up to 274 conditions per place. [2024-11-28 03:01:50,547 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-11-28 03:01:50,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 392 flow [2024-11-28 03:01:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:01:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:01:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-28 03:01:50,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-28 03:01:50,550 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 296 flow. Second operand 3 states and 270 transitions. [2024-11-28 03:01:50,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 392 flow [2024-11-28 03:01:50,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:01:50,555 INFO L231 Difference]: Finished difference. Result has 121 places, 120 transitions, 297 flow [2024-11-28 03:01:50,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=121, PETRI_TRANSITIONS=120} [2024-11-28 03:01:50,557 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-11-28 03:01:50,557 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 120 transitions, 297 flow [2024-11-28 03:01:50,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:50,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:50,558 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:01:50,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:50,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:50,758 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:50,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash -182322698, now seen corresponding path program 1 times [2024-11-28 03:01:50,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:50,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405253557] [2024-11-28 03:01:50,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:50,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:50,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:50,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:50,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:01:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:51,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:01:51,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:51,169 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 5 [2024-11-28 03:01:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:51,188 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:51,188 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:51,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405253557] [2024-11-28 03:01:51,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405253557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:01:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139194633] [2024-11-28 03:01:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:51,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:01:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:51,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:01:51,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:01:51,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-28 03:01:51,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 120 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:51,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:51,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-28 03:01:51,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:51,919 INFO L124 PetriNetUnfolderBase]: 128/543 cut-off events. [2024-11-28 03:01:51,919 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2024-11-28 03:01:51,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 543 events. 128/543 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2962 event pairs, 105 based on Foata normal form. 0/420 useless extension candidates. Maximal degree in co-relation 819. Up to 274 conditions per place. [2024-11-28 03:01:51,924 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-28 03:01:51,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 119 transitions, 393 flow [2024-11-28 03:01:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:01:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:01:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-28 03:01:51,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-28 03:01:51,926 INFO L175 Difference]: Start difference. First operand has 121 places, 120 transitions, 297 flow. Second operand 3 states and 270 transitions. [2024-11-28 03:01:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 119 transitions, 393 flow [2024-11-28 03:01:51,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:01:51,932 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 295 flow [2024-11-28 03:01:51,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2024-11-28 03:01:51,937 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 2 predicate places. [2024-11-28 03:01:51,937 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 295 flow [2024-11-28 03:01:51,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:51,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:51,938 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:51,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:52,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:52,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:52,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1357035486, now seen corresponding path program 1 times [2024-11-28 03:01:52,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:52,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365449778] [2024-11-28 03:01:52,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:52,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:01:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:52,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:01:52,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:52,580 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 5 [2024-11-28 03:01:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:52,625 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:52,626 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365449778] [2024-11-28 03:01:52,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365449778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:52,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:52,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:01:52,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415191658] [2024-11-28 03:01:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:52,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:01:52,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:52,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:01:52,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:01:53,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-28 03:01:53,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:53,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:53,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-28 03:01:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:53,498 INFO L124 PetriNetUnfolderBase]: 128/539 cut-off events. [2024-11-28 03:01:53,499 INFO L125 PetriNetUnfolderBase]: For 20/21 co-relation queries the response was YES. [2024-11-28 03:01:53,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 539 events. 128/539 cut-off events. For 20/21 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2935 event pairs, 105 based on Foata normal form. 4/424 useless extension candidates. Maximal degree in co-relation 817. Up to 276 conditions per place. [2024-11-28 03:01:53,502 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 47 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-11-28 03:01:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 117 transitions, 393 flow [2024-11-28 03:01:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:01:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:01:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2024-11-28 03:01:53,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-11-28 03:01:53,505 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 295 flow. Second operand 4 states and 332 transitions. [2024-11-28 03:01:53,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 117 transitions, 393 flow [2024-11-28 03:01:53,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:01:53,510 INFO L231 Difference]: Finished difference. Result has 119 places, 117 transitions, 293 flow [2024-11-28 03:01:53,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=119, PETRI_TRANSITIONS=117} [2024-11-28 03:01:53,511 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-28 03:01:53,511 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 293 flow [2024-11-28 03:01:53,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:53,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:53,512 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:53,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:01:53,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:53,713 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:53,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1357035487, now seen corresponding path program 1 times [2024-11-28 03:01:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328229325] [2024-11-28 03:01:53,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:53,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:53,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:53,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:53,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:01:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:54,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:01:54,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:54,101 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 [2024-11-28 03:01:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:54,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:54,117 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328229325] [2024-11-28 03:01:54,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328229325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:54,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:54,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:01:54,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920718120] [2024-11-28 03:01:54,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:54,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:01:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:54,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:01:54,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:01:54,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-28 03:01:54,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 117 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:54,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:54,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-28 03:01:54,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:54,849 INFO L124 PetriNetUnfolderBase]: 128/535 cut-off events. [2024-11-28 03:01:54,849 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2024-11-28 03:01:54,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 535 events. 128/535 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2928 event pairs, 105 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 818. Up to 274 conditions per place. [2024-11-28 03:01:54,853 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 44 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2024-11-28 03:01:54,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 115 transitions, 391 flow [2024-11-28 03:01:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:01:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:01:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2024-11-28 03:01:54,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5909774436090226 [2024-11-28 03:01:54,856 INFO L175 Difference]: Start difference. First operand has 119 places, 117 transitions, 293 flow. Second operand 5 states and 393 transitions. [2024-11-28 03:01:54,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 115 transitions, 391 flow [2024-11-28 03:01:54,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 115 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:01:54,861 INFO L231 Difference]: Finished difference. Result has 118 places, 115 transitions, 295 flow [2024-11-28 03:01:54,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=118, PETRI_TRANSITIONS=115} [2024-11-28 03:01:54,862 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2024-11-28 03:01:54,862 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 115 transitions, 295 flow [2024-11-28 03:01:54,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:54,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:54,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:54,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:01:55,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:55,064 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:55,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1357031290, now seen corresponding path program 1 times [2024-11-28 03:01:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:55,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280360207] [2024-11-28 03:01:55,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:55,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:55,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:55,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:55,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:01:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:55,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 03:01:55,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:55,430 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:55,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280360207] [2024-11-28 03:01:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280360207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:55,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:55,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:01:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22370631] [2024-11-28 03:01:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:55,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:01:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:55,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:01:55,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:01:55,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:01:55,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 115 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:55,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:55,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:01:55,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:55,874 INFO L124 PetriNetUnfolderBase]: 127/571 cut-off events. [2024-11-28 03:01:55,874 INFO L125 PetriNetUnfolderBase]: For 21/22 co-relation queries the response was YES. [2024-11-28 03:01:55,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 571 events. 127/571 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3111 event pairs, 105 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 837. Up to 277 conditions per place. [2024-11-28 03:01:55,878 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-28 03:01:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 413 flow [2024-11-28 03:01:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:01:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:01:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-28 03:01:55,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-11-28 03:01:55,884 INFO L175 Difference]: Start difference. First operand has 118 places, 115 transitions, 295 flow. Second operand 3 states and 278 transitions. [2024-11-28 03:01:55,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 413 flow [2024-11-28 03:01:55,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:01:55,889 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 290 flow [2024-11-28 03:01:55,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2024-11-28 03:01:55,890 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-28 03:01:55,890 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 290 flow [2024-11-28 03:01:55,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:55,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:55,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:55,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:01:56,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:56,091 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:56,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1558983214, now seen corresponding path program 1 times [2024-11-28 03:01:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757800656] [2024-11-28 03:01:56,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:56,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:56,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:56,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:01:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:56,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:01:56,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:56,691 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-28 03:01:56,691 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 16 treesize of output 17 [2024-11-28 03:01:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:56,831 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:56,831 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757800656] [2024-11-28 03:01:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757800656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:56,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:01:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034281455] [2024-11-28 03:01:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:56,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:01:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:56,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:01:56,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:01:57,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-28 03:01:57,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:57,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:57,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-28 03:01:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:58,144 INFO L124 PetriNetUnfolderBase]: 126/537 cut-off events. [2024-11-28 03:01:58,144 INFO L125 PetriNetUnfolderBase]: For 27/28 co-relation queries the response was YES. [2024-11-28 03:01:58,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 537 events. 126/537 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2920 event pairs, 64 based on Foata normal form. 4/422 useless extension candidates. Maximal degree in co-relation 810. Up to 192 conditions per place. [2024-11-28 03:01:58,149 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 70 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-28 03:01:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 482 flow [2024-11-28 03:01:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:01:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:01:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2024-11-28 03:01:58,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-11-28 03:01:58,152 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 290 flow. Second operand 4 states and 348 transitions. [2024-11-28 03:01:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 482 flow [2024-11-28 03:01:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 136 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:01:58,156 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 293 flow [2024-11-28 03:01:58,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=117, PETRI_TRANSITIONS=113} [2024-11-28 03:01:58,157 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-28 03:01:58,158 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 293 flow [2024-11-28 03:01:58,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:58,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:58,158 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:58,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:01:58,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:58,359 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:01:58,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1558983215, now seen corresponding path program 1 times [2024-11-28 03:01:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:01:58,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440349484] [2024-11-28 03:01:58,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:58,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:58,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:58,365 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:58,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:01:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:58,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:01:58,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:01:58,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:01:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:59,088 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:01:59,088 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:01:59,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440349484] [2024-11-28 03:01:59,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440349484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:01:59,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:01:59,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:01:59,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941450688] [2024-11-28 03:01:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:01:59,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:01:59,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:01:59,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:01:59,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:01:59,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-28 03:01:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-28 03:01:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:00,317 INFO L124 PetriNetUnfolderBase]: 128/561 cut-off events. [2024-11-28 03:02:00,318 INFO L125 PetriNetUnfolderBase]: For 53/54 co-relation queries the response was YES. [2024-11-28 03:02:00,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 561 events. 128/561 cut-off events. For 53/54 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3023 event pairs, 106 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 857. Up to 281 conditions per place. [2024-11-28 03:02:00,321 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-28 03:02:00,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 433 flow [2024-11-28 03:02:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:02:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:02:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2024-11-28 03:02:00,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6409774436090225 [2024-11-28 03:02:00,324 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 293 flow. Second operand 4 states and 341 transitions. [2024-11-28 03:02:00,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 433 flow [2024-11-28 03:02:00,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:02:00,328 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 321 flow [2024-11-28 03:02:00,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2024-11-28 03:02:00,329 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-28 03:02:00,329 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 321 flow [2024-11-28 03:02:00,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:00,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:00,330 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:00,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:02:00,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:00,531 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:00,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1083840329, now seen corresponding path program 1 times [2024-11-28 03:02:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223284120] [2024-11-28 03:02:00,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:00,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:00,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:02:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:00,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:02:00,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:01,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:02:01,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:02:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 03:02:01,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 03:02:01,449 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:02:01,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 03:02:01,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:02:01,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:01,991 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:02:01,991 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:01,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223284120] [2024-11-28 03:02:01,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223284120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:01,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:01,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:02:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412896060] [2024-11-28 03:02:01,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:01,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:02:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:01,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:02:01,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:02:05,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2024-11-28 03:02:05,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:05,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:05,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2024-11-28 03:02:05,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:07,571 INFO L124 PetriNetUnfolderBase]: 128/560 cut-off events. [2024-11-28 03:02:07,572 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2024-11-28 03:02:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 560 events. 128/560 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3034 event pairs, 106 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 867. Up to 294 conditions per place. [2024-11-28 03:02:07,574 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 68 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-28 03:02:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 132 transitions, 517 flow [2024-11-28 03:02:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:02:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:02:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 695 transitions. [2024-11-28 03:02:07,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4750512645249487 [2024-11-28 03:02:07,579 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 321 flow. Second operand 11 states and 695 transitions. [2024-11-28 03:02:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 132 transitions, 517 flow [2024-11-28 03:02:07,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 132 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:02:07,586 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 375 flow [2024-11-28 03:02:07,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2024-11-28 03:02:07,587 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-11-28 03:02:07,587 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 375 flow [2024-11-28 03:02:07,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:07,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:07,588 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:07,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:02:07,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:07,789 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:07,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1083840328, now seen corresponding path program 1 times [2024-11-28 03:02:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:07,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284205751] [2024-11-28 03:02:07,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:07,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:07,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:07,792 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:07,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:02:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:08,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:02:08,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:08,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:02:08,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 03:02:08,585 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:02:08,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 03:02:08,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:08,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:08,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-28 03:02:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:08,851 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:02:08,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284205751] [2024-11-28 03:02:08,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284205751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:08,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:08,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:02:08,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835242437] [2024-11-28 03:02:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:08,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:02:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:08,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:02:08,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:02:11,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2024-11-28 03:02:11,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:11,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:11,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2024-11-28 03:02:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:13,443 INFO L124 PetriNetUnfolderBase]: 128/559 cut-off events. [2024-11-28 03:02:13,443 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2024-11-28 03:02:13,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 559 events. 128/559 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3016 event pairs, 106 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 908. Up to 290 conditions per place. [2024-11-28 03:02:13,448 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 66 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-28 03:02:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 132 transitions, 559 flow [2024-11-28 03:02:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:02:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:02:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2024-11-28 03:02:13,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2024-11-28 03:02:13,453 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 375 flow. Second operand 11 states and 715 transitions. [2024-11-28 03:02:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 132 transitions, 559 flow [2024-11-28 03:02:13,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 132 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:02:13,459 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 397 flow [2024-11-28 03:02:13,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=397, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2024-11-28 03:02:13,461 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 23 predicate places. [2024-11-28 03:02:13,463 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 397 flow [2024-11-28 03:02:13,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:13,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:13,464 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:13,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:02:13,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:13,665 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:13,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash -760687352, now seen corresponding path program 1 times [2024-11-28 03:02:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564128309] [2024-11-28 03:02:13,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:13,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:13,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:02:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:14,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:02:14,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:14,179 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 5 [2024-11-28 03:02:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:14,281 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:02:14,281 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564128309] [2024-11-28 03:02:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564128309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:14,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:14,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:02:14,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122201534] [2024-11-28 03:02:14,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:14,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:02:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:14,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:02:14,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:02:14,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 133 [2024-11-28 03:02:14,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:14,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:14,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 133 [2024-11-28 03:02:14,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:15,053 INFO L124 PetriNetUnfolderBase]: 127/549 cut-off events. [2024-11-28 03:02:15,054 INFO L125 PetriNetUnfolderBase]: For 69/70 co-relation queries the response was YES. [2024-11-28 03:02:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 549 events. 127/549 cut-off events. For 69/70 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2957 event pairs, 105 based on Foata normal form. 8/445 useless extension candidates. Maximal degree in co-relation 892. Up to 271 conditions per place. [2024-11-28 03:02:15,058 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-28 03:02:15,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 119 transitions, 503 flow [2024-11-28 03:02:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:02:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:02:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2024-11-28 03:02:15,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2024-11-28 03:02:15,061 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 397 flow. Second operand 4 states and 338 transitions. [2024-11-28 03:02:15,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 119 transitions, 503 flow [2024-11-28 03:02:15,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 119 transitions, 481 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-28 03:02:15,066 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 389 flow [2024-11-28 03:02:15,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-11-28 03:02:15,067 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-11-28 03:02:15,067 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 389 flow [2024-11-28 03:02:15,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:15,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:15,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:15,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:02:15,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:15,268 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:15,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -760687353, now seen corresponding path program 1 times [2024-11-28 03:02:15,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:15,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898764998] [2024-11-28 03:02:15,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:15,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:15,273 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:15,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:02:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:15,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:02:15,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:15,715 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:02:15,715 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898764998] [2024-11-28 03:02:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898764998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:15,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:15,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:02:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667972970] [2024-11-28 03:02:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:15,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:02:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:15,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:02:15,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:02:16,059 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-28 03:02:16,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:16,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:16,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-28 03:02:16,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:16,692 INFO L124 PetriNetUnfolderBase]: 127/541 cut-off events. [2024-11-28 03:02:16,692 INFO L125 PetriNetUnfolderBase]: For 55/56 co-relation queries the response was YES. [2024-11-28 03:02:16,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 541 events. 127/541 cut-off events. For 55/56 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2915 event pairs, 105 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 904. Up to 273 conditions per place. [2024-11-28 03:02:16,696 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 49 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-11-28 03:02:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 117 transitions, 505 flow [2024-11-28 03:02:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:02:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:02:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-11-28 03:02:16,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939849624060151 [2024-11-28 03:02:16,700 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 389 flow. Second operand 5 states and 395 transitions. [2024-11-28 03:02:16,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 117 transitions, 505 flow [2024-11-28 03:02:16,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 117 transitions, 487 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:02:16,704 INFO L231 Difference]: Finished difference. Result has 131 places, 117 transitions, 389 flow [2024-11-28 03:02:16,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=131, PETRI_TRANSITIONS=117} [2024-11-28 03:02:16,705 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2024-11-28 03:02:16,705 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 117 transitions, 389 flow [2024-11-28 03:02:16,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:16,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:16,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:16,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:16,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:16,907 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:16,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1270333162, now seen corresponding path program 1 times [2024-11-28 03:02:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:16,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123849905] [2024-11-28 03:02:16,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:16,913 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:02:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:17,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:02:17,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:17,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:17,434 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123849905] [2024-11-28 03:02:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123849905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:17,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:02:17,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-28 03:02:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428230487] [2024-11-28 03:02:17,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:17,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:02:17,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:17,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:02:17,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:02:17,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:02:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 117 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:17,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:02:17,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:18,168 INFO L124 PetriNetUnfolderBase]: 127/591 cut-off events. [2024-11-28 03:02:18,168 INFO L125 PetriNetUnfolderBase]: For 150/151 co-relation queries the response was YES. [2024-11-28 03:02:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 591 events. 127/591 cut-off events. For 150/151 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3050 event pairs, 105 based on Foata normal form. 6/489 useless extension candidates. Maximal degree in co-relation 1025. Up to 267 conditions per place. [2024-11-28 03:02:18,174 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 63 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-11-28 03:02:18,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 136 transitions, 665 flow [2024-11-28 03:02:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:02:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:02:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2024-11-28 03:02:18,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.650375939849624 [2024-11-28 03:02:18,178 INFO L175 Difference]: Start difference. First operand has 131 places, 117 transitions, 389 flow. Second operand 6 states and 519 transitions. [2024-11-28 03:02:18,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 136 transitions, 665 flow [2024-11-28 03:02:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 611 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:02:18,185 INFO L231 Difference]: Finished difference. Result has 136 places, 122 transitions, 453 flow [2024-11-28 03:02:18,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=136, PETRI_TRANSITIONS=122} [2024-11-28 03:02:18,188 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 18 predicate places. [2024-11-28 03:02:18,188 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 122 transitions, 453 flow [2024-11-28 03:02:18,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:18,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:18,189 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:18,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:18,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:18,390 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:18,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1414227557, now seen corresponding path program 1 times [2024-11-28 03:02:18,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:18,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082359404] [2024-11-28 03:02:18,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:18,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:18,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:02:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:18,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:02:18,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:18,921 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 5 [2024-11-28 03:02:19,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2024-11-28 03:02:19,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 1 [2024-11-28 03:02:19,515 INFO L349 Elim1Store]: treesize reduction 31, result has 46.6 percent of original size [2024-11-28 03:02:19,516 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 23 treesize of output 31 [2024-11-28 03:02:19,603 INFO L349 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2024-11-28 03:02:19,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2024-11-28 03:02:19,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-28 03:02:19,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-28 03:02:19,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-28 03:02:19,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-28 03:02:19,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-28 03:02:19,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:02:20,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-11-28 03:02:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:20,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:20,384 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-28 03:02:20,478 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-28 03:02:20,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:20,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 50 treesize of output 51 [2024-11-28 03:02:21,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:21,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 42 treesize of output 43 [2024-11-28 03:02:21,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:21,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 81 [2024-11-28 03:02:21,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:21,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 118 [2024-11-28 03:02:21,160 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 28 treesize of output 21 [2024-11-28 03:02:21,178 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 21 treesize of output 14 [2024-11-28 03:02:22,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:22,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 47 treesize of output 40 [2024-11-28 03:02:22,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:22,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-28 03:02:22,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2024-11-28 03:02:28,437 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2024-11-28 03:02:28,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 156 [2024-11-28 03:02:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-28 03:02:31,981 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:02:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082359404] [2024-11-28 03:02:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082359404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:31,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:02:31,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-28 03:02:31,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607946151] [2024-11-28 03:02:31,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:31,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:02:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:02:31,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:02:31,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=327, Unknown=4, NotChecked=74, Total=462 [2024-11-28 03:02:33,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 133 [2024-11-28 03:02:33,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 122 transitions, 453 flow. Second operand has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:33,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:33,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 133 [2024-11-28 03:02:33,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:45,552 INFO L124 PetriNetUnfolderBase]: 465/1265 cut-off events. [2024-11-28 03:02:45,552 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-28 03:02:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 1265 events. 465/1265 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7545 event pairs, 422 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 2437. Up to 955 conditions per place. [2024-11-28 03:02:45,561 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 85 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-11-28 03:02:45,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 719 flow [2024-11-28 03:02:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:02:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:02:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-11-28 03:02:45,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20247046186895812 [2024-11-28 03:02:45,567 INFO L175 Difference]: Start difference. First operand has 136 places, 122 transitions, 453 flow. Second operand 14 states and 377 transitions. [2024-11-28 03:02:45,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 719 flow [2024-11-28 03:02:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 133 transitions, 703 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 03:02:45,574 INFO L231 Difference]: Finished difference. Result has 151 places, 129 transitions, 535 flow [2024-11-28 03:02:45,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=535, PETRI_PLACES=151, PETRI_TRANSITIONS=129} [2024-11-28 03:02:45,575 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 33 predicate places. [2024-11-28 03:02:45,575 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 129 transitions, 535 flow [2024-11-28 03:02:45,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:45,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:45,576 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:45,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:02:45,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:45,777 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:02:45,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1414227556, now seen corresponding path program 1 times [2024-11-28 03:02:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:02:45,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294947821] [2024-11-28 03:02:45,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:45,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:45,781 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:45,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:02:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:46,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:02:46,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:46,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 1 [2024-11-28 03:02:46,943 INFO L349 Elim1Store]: treesize reduction 94, result has 30.4 percent of original size [2024-11-28 03:02:46,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2024-11-28 03:02:47,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2024-11-28 03:02:47,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2024-11-28 03:02:47,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-28 03:02:47,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2024-11-28 03:02:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:47,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:47,681 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_678) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-28 03:02:47,725 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_678) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-28 03:02:47,785 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_~p~0#1.base_48| (_ BitVec 32)) (v_ArrVal_675 (_ BitVec 1)) (v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_48|))) (= (_ bv0 1) (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_48| v_ArrVal_675) (select (select (store |c_#memory_$Pointer$#3.base| |v_ULTIMATE.start_new_~p~0#1.base_48| v_ArrVal_678) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))))))) is different from false [2024-11-28 03:02:47,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:47,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 30 treesize of output 31 [2024-11-28 03:02:47,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:02:47,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 57 [2024-11-28 03:02:47,900 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 21 treesize of output 14 [2024-11-28 03:03:00,062 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2024-11-28 03:03:00,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2024-11-28 03:03:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 03:03:00,740 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:03:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294947821] [2024-11-28 03:03:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294947821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-28 03:03:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285869182] [2024-11-28 03:03:00,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:00,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:03:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:03:00,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:03:00,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=201, Unknown=5, NotChecked=90, Total=342 [2024-11-28 03:03:01,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 133 [2024-11-28 03:03:01,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 129 transitions, 535 flow. Second operand has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:01,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:01,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 133 [2024-11-28 03:03:01,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:05,862 INFO L124 PetriNetUnfolderBase]: 329/1031 cut-off events. [2024-11-28 03:03:05,862 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-28 03:03:05,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1031 events. 329/1031 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6070 event pairs, 292 based on Foata normal form. 6/807 useless extension candidates. Maximal degree in co-relation 1997. Up to 679 conditions per place. [2024-11-28 03:03:05,872 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 76 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-11-28 03:03:05,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 132 transitions, 749 flow [2024-11-28 03:03:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:03:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:03:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 446 transitions. [2024-11-28 03:03:05,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2794486215538847 [2024-11-28 03:03:05,876 INFO L175 Difference]: Start difference. First operand has 151 places, 129 transitions, 535 flow. Second operand 12 states and 446 transitions. [2024-11-28 03:03:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 132 transitions, 749 flow [2024-11-28 03:03:05,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 132 transitions, 716 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-28 03:03:05,883 INFO L231 Difference]: Finished difference. Result has 159 places, 129 transitions, 563 flow [2024-11-28 03:03:05,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=563, PETRI_PLACES=159, PETRI_TRANSITIONS=129} [2024-11-28 03:03:05,884 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 41 predicate places. [2024-11-28 03:03:05,885 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 129 transitions, 563 flow [2024-11-28 03:03:05,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:05,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:05,886 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:05,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:03:06,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:06,087 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:03:06,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1031281030, now seen corresponding path program 2 times [2024-11-28 03:03:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:03:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217414640] [2024-11-28 03:03:06,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:06,092 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:03:06,807 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:06,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:06,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:03:06,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 03:03:07,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 03:03:07,366 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:03:07,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217414640] [2024-11-28 03:03:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217414640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:07,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-11-28 03:03:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901989534] [2024-11-28 03:03:07,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:07,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:03:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:03:07,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:03:07,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:03:07,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:03:07,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 129 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:07,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:07,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:03:07,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:08,653 INFO L124 PetriNetUnfolderBase]: 129/686 cut-off events. [2024-11-28 03:03:08,653 INFO L125 PetriNetUnfolderBase]: For 399/400 co-relation queries the response was YES. [2024-11-28 03:03:08,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 686 events. 129/686 cut-off events. For 399/400 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2679 event pairs, 105 based on Foata normal form. 3/588 useless extension candidates. Maximal degree in co-relation 1461. Up to 261 conditions per place. [2024-11-28 03:03:08,658 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 95 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2024-11-28 03:03:08,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 166 transitions, 1089 flow [2024-11-28 03:03:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:03:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:03:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-28 03:03:08,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6616541353383458 [2024-11-28 03:03:08,660 INFO L175 Difference]: Start difference. First operand has 159 places, 129 transitions, 563 flow. Second operand 6 states and 528 transitions. [2024-11-28 03:03:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 166 transitions, 1089 flow [2024-11-28 03:03:08,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 166 transitions, 973 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-28 03:03:08,669 INFO L231 Difference]: Finished difference. Result has 157 places, 132 transitions, 570 flow [2024-11-28 03:03:08,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=157, PETRI_TRANSITIONS=132} [2024-11-28 03:03:08,670 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 39 predicate places. [2024-11-28 03:03:08,670 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 132 transitions, 570 flow [2024-11-28 03:03:08,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:08,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:08,670 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-28 03:03:08,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:03:08,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:08,871 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:03:08,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1031281080, now seen corresponding path program 1 times [2024-11-28 03:03:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:03:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448333758] [2024-11-28 03:03:08,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:08,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:08,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:08,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:03:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:09,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:03:09,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:09,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:10,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:03:10,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448333758] [2024-11-28 03:03:10,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448333758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:10,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:10,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-28 03:03:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135109211] [2024-11-28 03:03:10,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:10,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:03:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:03:10,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:03:10,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:03:10,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:03:10,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 132 transitions, 570 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:10,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:10,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:03:10,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:12,830 INFO L124 PetriNetUnfolderBase]: 129/938 cut-off events. [2024-11-28 03:03:12,830 INFO L125 PetriNetUnfolderBase]: For 846/847 co-relation queries the response was YES. [2024-11-28 03:03:12,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 938 events. 129/938 cut-off events. For 846/847 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2739 event pairs, 105 based on Foata normal form. 24/861 useless extension candidates. Maximal degree in co-relation 2193. Up to 274 conditions per place. [2024-11-28 03:03:12,835 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 96 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-11-28 03:03:12,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 184 transitions, 1188 flow [2024-11-28 03:03:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:03:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:03:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1008 transitions. [2024-11-28 03:03:12,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-11-28 03:03:12,839 INFO L175 Difference]: Start difference. First operand has 157 places, 132 transitions, 570 flow. Second operand 12 states and 1008 transitions. [2024-11-28 03:03:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 184 transitions, 1188 flow [2024-11-28 03:03:12,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 184 transitions, 1178 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-28 03:03:12,851 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 837 flow [2024-11-28 03:03:12,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=837, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-11-28 03:03:12,852 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 56 predicate places. [2024-11-28 03:03:12,852 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 837 flow [2024-11-28 03:03:12,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:12,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:12,853 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-28 03:03:12,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:03:13,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:13,054 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:03:13,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1724697400, now seen corresponding path program 2 times [2024-11-28 03:03:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:03:13,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129192403] [2024-11-28 03:03:13,058 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:13,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:13,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:13,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:13,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:03:14,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:14,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:14,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:03:14,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:15,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:16,457 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:03:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129192403] [2024-11-28 03:03:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129192403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:16,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 03:03:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100478024] [2024-11-28 03:03:16,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:16,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:03:16,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:03:16,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:03:16,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:03:16,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-28 03:03:16,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 837 flow. Second operand has 24 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:16,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-28 03:03:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:24,212 INFO L124 PetriNetUnfolderBase]: 129/1442 cut-off events. [2024-11-28 03:03:24,212 INFO L125 PetriNetUnfolderBase]: For 3842/3843 co-relation queries the response was YES. [2024-11-28 03:03:24,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4207 conditions, 1442 events. 129/1442 cut-off events. For 3842/3843 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2830 event pairs, 105 based on Foata normal form. 48/1389 useless extension candidates. Maximal degree in co-relation 4115. Up to 274 conditions per place. [2024-11-28 03:03:24,219 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 156 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-11-28 03:03:24,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 268 transitions, 2274 flow [2024-11-28 03:03:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:03:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:03:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1986 transitions. [2024-11-28 03:03:24,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6221804511278195 [2024-11-28 03:03:24,224 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 837 flow. Second operand 24 states and 1986 transitions. [2024-11-28 03:03:24,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 268 transitions, 2274 flow [2024-11-28 03:03:24,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 268 transitions, 2262 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:03:24,247 INFO L231 Difference]: Finished difference. Result has 207 places, 170 transitions, 1466 flow [2024-11-28 03:03:24,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1466, PETRI_PLACES=207, PETRI_TRANSITIONS=170} [2024-11-28 03:03:24,248 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 89 predicate places. [2024-11-28 03:03:24,249 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 170 transitions, 1466 flow [2024-11-28 03:03:24,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:24,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:24,250 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2024-11-28 03:03:24,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:24,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:24,455 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-28 03:03:24,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:24,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1742614984, now seen corresponding path program 3 times [2024-11-28 03:03:24,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:03:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658516439] [2024-11-28 03:03:24,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:24,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:24,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:24,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99102e5f-354d-40ee-88ae-3eb57cdc7091/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process