./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:34:51,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:34:51,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:34:51,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:34:51,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:34:51,741 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:34:51,741 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:34:51,742 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:34:51,742 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:34:51,742 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:34:51,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:34:51,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:34:51,743 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:34:51,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:34:51,743 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:34:51,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:34:51,743 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:34:51,743 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:34:51,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:34:51,744 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:34:51,745 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:34:51,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:34:51,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:34:51,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:34:51,746 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:34:51,747 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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2024-11-27 20:34:52,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:34:52,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:34:52,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:34:52,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:34:52,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:34:52,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2024-11-27 20:34:54,977 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/569d42e51/2df5eb2a34884134b5cef37fde4cbe66/FLAG2c8917e8e [2024-11-27 20:34:55,361 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:34:55,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2024-11-27 20:34:55,386 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/569d42e51/2df5eb2a34884134b5cef37fde4cbe66/FLAG2c8917e8e [2024-11-27 20:34:55,408 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/569d42e51/2df5eb2a34884134b5cef37fde4cbe66 [2024-11-27 20:34:55,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:34:55,413 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:34:55,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:34:55,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:34:55,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:34:55,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:34:55" (1/1) ... [2024-11-27 20:34:55,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202207c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:34:55, skipping insertion in model container [2024-11-27 20:34:55,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:34:55" (1/1) ... [2024-11-27 20:34:55,490 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:34:56,214 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:34:56,215 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:34:56,215 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:34:56,216 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:34:56,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:34:56,334 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) [2024-11-27 20:34:56,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@563c4fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:34:56, skipping insertion in model container [2024-11-27 20:34:56,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:34:56,339 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-27 20:34:56,341 INFO L158 Benchmark]: Toolchain (without parser) took 927.23ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.0MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:34:56,342 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 117.4MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:34:56,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 922.11ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.0MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:34:56,343 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 117.4MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 922.11ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.0MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1038]: 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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:34:59,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:34:59,494 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-27 20:34:59,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:34:59,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:34:59,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:34:59,537 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:34:59,537 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:34:59,538 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:34:59,538 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:34:59,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:34:59,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:34:59,541 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:34:59,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:34:59,541 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:34:59,542 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:34:59,544 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:34:59,544 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:34:59,544 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:34:59,545 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:34:59,545 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:34:59,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:34:59,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:34:59,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:34:59,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:34:59,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:34:59,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:34:59,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:34:59,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:34:59,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:34:59,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:34:59,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:34:59,548 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:34:59,548 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:34:59,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:34:59,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:34:59,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:34:59,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:34:59,549 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_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2024-11-27 20:34:59,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:34:59,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:34:59,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:34:59,939 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:34:59,939 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:34:59,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2024-11-27 20:35:03,466 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/7702e95b4/c89c1dbedfb84bfba31d47bd16b222e0/FLAGf21a084a8 [2024-11-27 20:35:03,872 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:35:03,872 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2024-11-27 20:35:03,894 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/7702e95b4/c89c1dbedfb84bfba31d47bd16b222e0/FLAGf21a084a8 [2024-11-27 20:35:03,914 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/data/7702e95b4/c89c1dbedfb84bfba31d47bd16b222e0 [2024-11-27 20:35:03,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:35:03,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:35:03,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:35:03,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:35:03,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:35:03,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:35:03" (1/1) ... [2024-11-27 20:35:03,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6ff764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:03, skipping insertion in model container [2024-11-27 20:35:03,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:35:03" (1/1) ... [2024-11-27 20:35:03,976 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:35:04,700 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,700 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,701 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,702 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:35:04,793 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-27 20:35:04,813 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:35:04,872 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,873 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,873 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,873 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:04,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:35:04,944 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:35:05,006 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:05,007 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:05,007 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:05,008 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-27 20:35:05,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:35:05,145 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:35:05,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05 WrapperNode [2024-11-27 20:35:05,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:35:05,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:35:05,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:35:05,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:35:05,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,199 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,258 INFO L138 Inliner]: procedures = 275, calls = 98, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 187 [2024-11-27 20:35:05,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:35:05,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:35:05,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:35:05,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:35:05,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,324 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2024-11-27 20:35:05,325 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,325 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,355 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:35:05,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:35:05,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:35:05,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:35:05,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (1/1) ... [2024-11-27 20:35:05,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:35:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:05,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:35:05,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:35:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 20:35:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-27 20:35:05,469 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-27 20:35:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 20:35:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:35:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:35:05,472 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:35:05,733 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:35:05,736 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:35:06,923 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:35:06,923 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:35:09,260 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:35:09,261 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:35:09,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:35:09 BoogieIcfgContainer [2024-11-27 20:35:09,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:35:09,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:35:09,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:35:09,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:35:09,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:35:03" (1/3) ... [2024-11-27 20:35:09,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6279bf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:35:09, skipping insertion in model container [2024-11-27 20:35:09,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:35:05" (2/3) ... [2024-11-27 20:35:09,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6279bf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:35:09, skipping insertion in model container [2024-11-27 20:35:09,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:35:09" (3/3) ... [2024-11-27 20:35:09,277 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_22-nocollapse.i [2024-11-27 20:35:09,298 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:35:09,300 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_22-nocollapse.i that has 2 procedures, 60 locations, 1 initial locations, 4 loop locations, and 29 error locations. [2024-11-27 20:35:09,300 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:35:09,441 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:35:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2024-11-27 20:35:09,566 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2024-11-27 20:35:09,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:35:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 329 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-27 20:35:09,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2024-11-27 20:35:09,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2024-11-27 20:35:09,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:35:09,615 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;@65b16d54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:35:09,617 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-27 20:35:09,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:35:09,632 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-27 20:35:09,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:35:09,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:09,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:35:09,634 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:09,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash 533733, now seen corresponding path program 1 times [2024-11-27 20:35:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:09,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286155744] [2024-11-27 20:35:09,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:09,662 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:09,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:35:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:10,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:35:10,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:10,168 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:10,169 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:10,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286155744] [2024-11-27 20:35:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286155744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:10,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:10,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:35:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565936862] [2024-11-27 20:35:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:10,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:10,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:10,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:10,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 85 [2024-11-27 20:35:10,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:10,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:10,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 85 [2024-11-27 20:35:10,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:11,192 INFO L124 PetriNetUnfolderBase]: 482/968 cut-off events. [2024-11-27 20:35:11,193 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-27 20:35:11,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 968 events. 482/968 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5272 event pairs, 368 based on Foata normal form. 1/867 useless extension candidates. Maximal degree in co-relation 1692. Up to 752 conditions per place. [2024-11-27 20:35:11,216 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-11-27 20:35:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 238 flow [2024-11-27 20:35:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-11-27 20:35:11,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638235294117647 [2024-11-27 20:35:11,246 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 217 transitions. [2024-11-27 20:35:11,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 238 flow [2024-11-27 20:35:11,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:35:11,261 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2024-11-27 20:35:11,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-27 20:35:11,271 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-27 20:35:11,272 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2024-11-27 20:35:11,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:11,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:11,272 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:35:11,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:35:11,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:11,477 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:11,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 533734, now seen corresponding path program 1 times [2024-11-27 20:35:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:11,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197020786] [2024-11-27 20:35:11,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:11,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:11,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:35:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:11,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:35:11,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:12,065 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:12,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197020786] [2024-11-27 20:35:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197020786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:12,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:35:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111375220] [2024-11-27 20:35:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:12,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:12,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:12,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:12,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-11-27 20:35:12,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:12,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-11-27 20:35:12,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:13,159 INFO L124 PetriNetUnfolderBase]: 483/973 cut-off events. [2024-11-27 20:35:13,159 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:35:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 973 events. 483/973 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5230 event pairs, 368 based on Foata normal form. 3/875 useless extension candidates. Maximal degree in co-relation 1732. Up to 757 conditions per place. [2024-11-27 20:35:13,176 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 38 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-11-27 20:35:13,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 266 flow [2024-11-27 20:35:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-27 20:35:13,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-11-27 20:35:13,184 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 230 transitions. [2024-11-27 20:35:13,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 266 flow [2024-11-27 20:35:13,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:35:13,190 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2024-11-27 20:35:13,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-27 20:35:13,192 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-27 20:35:13,193 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2024-11-27 20:35:13,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:13,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:13,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:35:13,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:35:13,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:13,398 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:13,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1278948139, now seen corresponding path program 1 times [2024-11-27 20:35:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089434923] [2024-11-27 20:35:13,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:13,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:13,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:13,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:35:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:13,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:35:13,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:13,865 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 [2024-11-27 20:35:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:13,890 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:13,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:13,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089434923] [2024-11-27 20:35:13,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089434923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:13,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:13,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:35:13,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387231527] [2024-11-27 20:35:13,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:13,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:35:13,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:13,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:35:13,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:35:14,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-11-27 20:35:14,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:14,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:14,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-11-27 20:35:14,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:14,665 INFO L124 PetriNetUnfolderBase]: 483/972 cut-off events. [2024-11-27 20:35:14,666 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:35:14,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 972 events. 483/972 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5225 event pairs, 368 based on Foata normal form. 0/870 useless extension candidates. Maximal degree in co-relation 1738. Up to 753 conditions per place. [2024-11-27 20:35:14,674 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-11-27 20:35:14,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 277 flow [2024-11-27 20:35:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:35:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:35:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-27 20:35:14,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-11-27 20:35:14,681 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 183 transitions. [2024-11-27 20:35:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 277 flow [2024-11-27 20:35:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:35:14,685 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2024-11-27 20:35:14,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-27 20:35:14,686 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-27 20:35:14,686 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2024-11-27 20:35:14,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:14,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:14,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:35:14,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:35:14,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:14,892 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:14,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1278948140, now seen corresponding path program 1 times [2024-11-27 20:35:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641991481] [2024-11-27 20:35:14,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:14,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:14,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:14,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:35:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:15,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:35:15,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:15,281 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 [2024-11-27 20:35:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:15,289 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:15,289 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641991481] [2024-11-27 20:35:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641991481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:35:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306779600] [2024-11-27 20:35:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:15,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:35:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:15,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:35:15,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:35:15,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-11-27 20:35:15,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:15,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:15,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-11-27 20:35:15,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:15,855 INFO L124 PetriNetUnfolderBase]: 483/971 cut-off events. [2024-11-27 20:35:15,855 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:35:15,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 971 events. 483/971 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5196 event pairs, 368 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 1737. Up to 753 conditions per place. [2024-11-27 20:35:15,864 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-11-27 20:35:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 278 flow [2024-11-27 20:35:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:35:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:35:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-27 20:35:15,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-11-27 20:35:15,870 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-27 20:35:15,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 278 flow [2024-11-27 20:35:15,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:35:15,874 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2024-11-27 20:35:15,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-27 20:35:15,876 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-11-27 20:35:15,877 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2024-11-27 20:35:15,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:15,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:15,880 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:15,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:35:16,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:16,081 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:16,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash -992686136, now seen corresponding path program 1 times [2024-11-27 20:35:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443170081] [2024-11-27 20:35:16,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:16,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:35:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:16,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:35:16,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:16,426 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 [2024-11-27 20:35:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:16,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:16,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443170081] [2024-11-27 20:35:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443170081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:16,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:35:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590323471] [2024-11-27 20:35:16,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:16,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:16,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:16,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:16,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 85 [2024-11-27 20:35:16,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:16,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:16,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 85 [2024-11-27 20:35:16,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:17,109 INFO L124 PetriNetUnfolderBase]: 483/969 cut-off events. [2024-11-27 20:35:17,109 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:35:17,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1769 conditions, 969 events. 483/969 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5199 event pairs, 368 based on Foata normal form. 1/873 useless extension candidates. Maximal degree in co-relation 1737. Up to 753 conditions per place. [2024-11-27 20:35:17,121 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2024-11-27 20:35:17,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 278 flow [2024-11-27 20:35:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:35:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:35:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-11-27 20:35:17,124 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5976470588235294 [2024-11-27 20:35:17,124 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 5 states and 254 transitions. [2024-11-27 20:35:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 278 flow [2024-11-27 20:35:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 79 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:35:17,127 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 204 flow [2024-11-27 20:35:17,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-11-27 20:35:17,128 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-11-27 20:35:17,128 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 204 flow [2024-11-27 20:35:17,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:17,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:17,129 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-27 20:35:17,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:17,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:17,330 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:17,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash -992685243, now seen corresponding path program 1 times [2024-11-27 20:35:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031282479] [2024-11-27 20:35:17,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:17,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:17,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:17,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:35:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:17,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 20:35:17,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:17,646 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:17,646 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031282479] [2024-11-27 20:35:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031282479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:35:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124786913] [2024-11-27 20:35:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:17,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:35:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:17,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:35:17,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:35:17,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-11-27 20:35:17,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:17,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:17,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-11-27 20:35:17,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:18,063 INFO L124 PetriNetUnfolderBase]: 482/989 cut-off events. [2024-11-27 20:35:18,063 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-27 20:35:18,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1798 conditions, 989 events. 482/989 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5214 event pairs, 368 based on Foata normal form. 2/884 useless extension candidates. Maximal degree in co-relation 1767. Up to 753 conditions per place. [2024-11-27 20:35:18,072 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 40 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2024-11-27 20:35:18,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 304 flow [2024-11-27 20:35:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:35:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:35:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-11-27 20:35:18,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7490196078431373 [2024-11-27 20:35:18,074 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 204 flow. Second operand 3 states and 191 transitions. [2024-11-27 20:35:18,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 304 flow [2024-11-27 20:35:18,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 284 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:35:18,079 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 201 flow [2024-11-27 20:35:18,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-27 20:35:18,082 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-27 20:35:18,082 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 201 flow [2024-11-27 20:35:18,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:18,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:18,084 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:18,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:35:18,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:18,285 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:18,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash -992686135, now seen corresponding path program 1 times [2024-11-27 20:35:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506942307] [2024-11-27 20:35:18,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:18,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:18,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:18,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:18,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:35:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:18,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:35:18,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:18,606 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 [2024-11-27 20:35:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:18,645 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:18,646 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506942307] [2024-11-27 20:35:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506942307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:18,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:18,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:35:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101842950] [2024-11-27 20:35:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:18,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:18,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:18,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:18,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2024-11-27 20:35:18,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:18,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:18,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2024-11-27 20:35:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:19,385 INFO L124 PetriNetUnfolderBase]: 482/985 cut-off events. [2024-11-27 20:35:19,386 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-27 20:35:19,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 985 events. 482/985 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5199 event pairs, 368 based on Foata normal form. 2/882 useless extension candidates. Maximal degree in co-relation 1760. Up to 757 conditions per place. [2024-11-27 20:35:19,394 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-27 20:35:19,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 279 flow [2024-11-27 20:35:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-11-27 20:35:19,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441176470588236 [2024-11-27 20:35:19,397 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 201 flow. Second operand 4 states and 219 transitions. [2024-11-27 20:35:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 279 flow [2024-11-27 20:35:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:35:19,401 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 202 flow [2024-11-27 20:35:19,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-11-27 20:35:19,405 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-27 20:35:19,405 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 202 flow [2024-11-27 20:35:19,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:19,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:19,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:19,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:19,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:19,606 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:19,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash -488622422, now seen corresponding path program 1 times [2024-11-27 20:35:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:19,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469286610] [2024-11-27 20:35:19,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:19,613 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:19,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:35:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:19,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:35:19,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:20,029 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-27 20:35:20,029 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 [2024-11-27 20:35:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:20,156 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:20,156 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469286610] [2024-11-27 20:35:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469286610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:20,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:20,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:35:20,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049302417] [2024-11-27 20:35:20,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:20,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:35:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:20,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:35:20,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:35:20,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 85 [2024-11-27 20:35:20,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:20,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:20,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 85 [2024-11-27 20:35:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:21,122 INFO L124 PetriNetUnfolderBase]: 482/981 cut-off events. [2024-11-27 20:35:21,122 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-27 20:35:21,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 981 events. 482/981 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5172 event pairs, 368 based on Foata normal form. 2/882 useless extension candidates. Maximal degree in co-relation 1764. Up to 759 conditions per place. [2024-11-27 20:35:21,130 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-27 20:35:21,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 280 flow [2024-11-27 20:35:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-27 20:35:21,132 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-11-27 20:35:21,132 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 202 flow. Second operand 4 states and 215 transitions. [2024-11-27 20:35:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 280 flow [2024-11-27 20:35:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:35:21,135 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2024-11-27 20:35:21,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-11-27 20:35:21,139 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2024-11-27 20:35:21,140 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2024-11-27 20:35:21,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:21,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:21,141 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:21,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:35:21,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:21,342 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:21,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash -488622421, now seen corresponding path program 1 times [2024-11-27 20:35:21,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:21,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954316114] [2024-11-27 20:35:21,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:21,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:21,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:21,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:35:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:21,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:35:21,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:35:21,856 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 [2024-11-27 20:35:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:21,944 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:21,944 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954316114] [2024-11-27 20:35:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954316114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:21,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:21,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:35:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930122373] [2024-11-27 20:35:21,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:21,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:35:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:21,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:35:21,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:35:22,365 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-11-27 20:35:22,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:22,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:22,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-11-27 20:35:22,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:22,942 INFO L124 PetriNetUnfolderBase]: 483/1011 cut-off events. [2024-11-27 20:35:22,942 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-27 20:35:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 1011 events. 483/1011 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5527 event pairs, 368 based on Foata normal form. 2/898 useless extension candidates. Maximal degree in co-relation 1755. Up to 761 conditions per place. [2024-11-27 20:35:22,949 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 43 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-11-27 20:35:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 324 flow [2024-11-27 20:35:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-27 20:35:22,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2024-11-27 20:35:22,952 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 231 transitions. [2024-11-27 20:35:22,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 324 flow [2024-11-27 20:35:22,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:35:22,954 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2024-11-27 20:35:22,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-27 20:35:22,955 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-27 20:35:22,955 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2024-11-27 20:35:22,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:22,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:22,956 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:22,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:35:23,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:23,157 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:23,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2032574700, now seen corresponding path program 1 times [2024-11-27 20:35:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219729752] [2024-11-27 20:35:23,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:23,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:23,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:35:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:23,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 20:35:23,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:23,712 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 [2024-11-27 20:35:23,792 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 [2024-11-27 20:35:23,876 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:35:23,877 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 [2024-11-27 20:35:23,979 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 [2024-11-27 20:35:24,071 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 [2024-11-27 20:35:24,123 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 [2024-11-27 20:35:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:24,217 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:24,218 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:24,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219729752] [2024-11-27 20:35:24,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219729752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:24,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:24,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:35:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250813036] [2024-11-27 20:35:24,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:24,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:35:24,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:24,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:35:24,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:35:26,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2024-11-27 20:35:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2024-11-27 20:35:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:27,611 INFO L124 PetriNetUnfolderBase]: 483/1010 cut-off events. [2024-11-27 20:35:27,612 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-27 20:35:27,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 1010 events. 483/1010 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5556 event pairs, 368 based on Foata normal form. 0/910 useless extension candidates. Maximal degree in co-relation 1785. Up to 770 conditions per place. [2024-11-27 20:35:27,619 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-27 20:35:27,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 408 flow [2024-11-27 20:35:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:35:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:35:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2024-11-27 20:35:27,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2024-11-27 20:35:27,623 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 11 states and 430 transitions. [2024-11-27 20:35:27,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 408 flow [2024-11-27 20:35:27,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:35:27,627 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 292 flow [2024-11-27 20:35:27,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-11-27 20:35:27,628 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-27 20:35:27,628 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 292 flow [2024-11-27 20:35:27,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:27,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:27,629 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:27,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:27,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:27,829 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:27,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2032574701, now seen corresponding path program 1 times [2024-11-27 20:35:27,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:27,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075445011] [2024-11-27 20:35:27,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:27,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:27,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:35:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:28,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 20:35:28,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:28,297 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 [2024-11-27 20:35:28,332 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 [2024-11-27 20:35:28,404 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 [2024-11-27 20:35:28,428 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 11 [2024-11-27 20:35:28,560 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:35:28,561 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 [2024-11-27 20:35:28,577 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 [2024-11-27 20:35:28,675 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 16 treesize of output 11 [2024-11-27 20:35:28,701 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 [2024-11-27 20:35:28,778 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 16 treesize of output 11 [2024-11-27 20:35:28,788 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 [2024-11-27 20:35:28,843 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 16 treesize of output 11 [2024-11-27 20:35:28,855 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 [2024-11-27 20:35:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:28,952 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:28,952 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075445011] [2024-11-27 20:35:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075445011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:28,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:28,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:35:28,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699189936] [2024-11-27 20:35:28,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:28,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:35:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:28,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:35:28,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:35:30,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 85 [2024-11-27 20:35:30,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:30,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:30,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 85 [2024-11-27 20:35:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:31,934 INFO L124 PetriNetUnfolderBase]: 483/1009 cut-off events. [2024-11-27 20:35:31,934 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-27 20:35:31,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 1009 events. 483/1009 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5544 event pairs, 368 based on Foata normal form. 1/913 useless extension candidates. Maximal degree in co-relation 1834. Up to 774 conditions per place. [2024-11-27 20:35:31,942 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 58 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-27 20:35:31,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 460 flow [2024-11-27 20:35:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:35:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:35:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 410 transitions. [2024-11-27 20:35:31,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4385026737967914 [2024-11-27 20:35:31,946 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 292 flow. Second operand 11 states and 410 transitions. [2024-11-27 20:35:31,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 460 flow [2024-11-27 20:35:31,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:35:31,950 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 314 flow [2024-11-27 20:35:31,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=314, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-11-27 20:35:31,951 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2024-11-27 20:35:31,951 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 314 flow [2024-11-27 20:35:31,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:31,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:31,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:31,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:35:32,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:32,153 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:32,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1414693240, now seen corresponding path program 1 times [2024-11-27 20:35:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087152880] [2024-11-27 20:35:32,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:32,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:32,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:35:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:32,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:35:32,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:32,615 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 [2024-11-27 20:35:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:32,687 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:32,687 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087152880] [2024-11-27 20:35:32,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087152880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:32,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:35:32,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935598108] [2024-11-27 20:35:32,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:32,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:32,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:32,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:32,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2024-11-27 20:35:32,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:32,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:32,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2024-11-27 20:35:32,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:33,281 INFO L124 PetriNetUnfolderBase]: 483/1001 cut-off events. [2024-11-27 20:35:33,281 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-27 20:35:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 1001 events. 483/1001 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5429 event pairs, 368 based on Foata normal form. 8/909 useless extension candidates. Maximal degree in co-relation 1820. Up to 754 conditions per place. [2024-11-27 20:35:33,290 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-27 20:35:33,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 402 flow [2024-11-27 20:35:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:35:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:35:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2024-11-27 20:35:33,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-11-27 20:35:33,293 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 314 flow. Second operand 4 states and 225 transitions. [2024-11-27 20:35:33,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 402 flow [2024-11-27 20:35:33,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 380 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-27 20:35:33,297 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2024-11-27 20:35:33,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-11-27 20:35:33,298 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-27 20:35:33,298 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2024-11-27 20:35:33,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:33,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:33,298 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:33,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:35:33,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:33,499 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:33,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1414693241, now seen corresponding path program 1 times [2024-11-27 20:35:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:33,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862264896] [2024-11-27 20:35:33,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:33,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:33,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:33,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:35:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:33,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:35:33,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:33,913 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:33,913 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862264896] [2024-11-27 20:35:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862264896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:33,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:33,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:35:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362386804] [2024-11-27 20:35:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:33,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:35:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:33,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:35:33,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:35:34,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 85 [2024-11-27 20:35:34,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 85 [2024-11-27 20:35:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:34,739 INFO L124 PetriNetUnfolderBase]: 483/993 cut-off events. [2024-11-27 20:35:34,739 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-27 20:35:34,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 993 events. 483/993 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5369 event pairs, 368 based on Foata normal form. 0/901 useless extension candidates. Maximal degree in co-relation 1832. Up to 756 conditions per place. [2024-11-27 20:35:34,747 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 40 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-11-27 20:35:34,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 404 flow [2024-11-27 20:35:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:35:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:35:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-11-27 20:35:34,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6023529411764705 [2024-11-27 20:35:34,750 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 5 states and 256 transitions. [2024-11-27 20:35:34,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 404 flow [2024-11-27 20:35:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 386 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:35:34,753 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 306 flow [2024-11-27 20:35:34,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2024-11-27 20:35:34,754 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2024-11-27 20:35:34,754 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 306 flow [2024-11-27 20:35:34,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:34,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:34,755 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:34,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:34,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:34,955 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:34,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1660065683, now seen corresponding path program 1 times [2024-11-27 20:35:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42625827] [2024-11-27 20:35:34,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:34,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:34,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:35:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:35,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:35:35,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:35,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:35:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:35,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42625827] [2024-11-27 20:35:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42625827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:35:35,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:35:35,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-27 20:35:35,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957402570] [2024-11-27 20:35:35,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:35:35,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:35:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:35,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:35:35,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:35:35,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-11-27 20:35:35,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:35,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:35:35,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-11-27 20:35:35,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:35:35,934 INFO L124 PetriNetUnfolderBase]: 483/1043 cut-off events. [2024-11-27 20:35:35,934 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-11-27 20:35:35,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 1043 events. 483/1043 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5375 event pairs, 368 based on Foata normal form. 6/953 useless extension candidates. Maximal degree in co-relation 1953. Up to 750 conditions per place. [2024-11-27 20:35:35,950 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-11-27 20:35:35,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 564 flow [2024-11-27 20:35:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:35:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:35:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 354 transitions. [2024-11-27 20:35:35,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2024-11-27 20:35:35,953 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 306 flow. Second operand 6 states and 354 transitions. [2024-11-27 20:35:35,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 564 flow [2024-11-27 20:35:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 510 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:35:35,958 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2024-11-27 20:35:35,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-11-27 20:35:35,961 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2024-11-27 20:35:35,961 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2024-11-27 20:35:35,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:35:35,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:35:35,962 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:35:35,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:35:36,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:36,162 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-27 20:35:36,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1505499845, now seen corresponding path program 1 times [2024-11-27 20:35:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:36,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285178148] [2024-11-27 20:35:36,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:36,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:36,166 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:36,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f74bc7-9970-46b9-ad43-bafbaafcf3a5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:35:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:36,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-27 20:35:36,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:36,599 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 [2024-11-27 20:35:36,848 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 15 treesize of output 11 [2024-11-27 20:35:36,860 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 23 treesize of output 1 [2024-11-27 20:35:36,922 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:35:36,923 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 [2024-11-27 20:35:36,954 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-11-27 20:35:36,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-27 20:35:37,036 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 22 treesize of output 17 [2024-11-27 20:35:37,060 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 20 treesize of output 15 [2024-11-27 20:35:37,126 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 22 treesize of output 17 [2024-11-27 20:35:37,144 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 20 treesize of output 15 [2024-11-27 20:35:37,201 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 18 treesize of output 13 [2024-11-27 20:35:37,212 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 16 treesize of output 11 [2024-11-27 20:35:37,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:35:37,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:35:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:35:37,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:35:37,673 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-11-27 20:35:37,756 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-11-27 20:35:38,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,074 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 48 treesize of output 49 [2024-11-27 20:35:38,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,091 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 40 treesize of output 41 [2024-11-27 20:35:38,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,123 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 74 treesize of output 77 [2024-11-27 20:35:38,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,167 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 118 treesize of output 113 [2024-11-27 20:35:38,188 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 26 treesize of output 20 [2024-11-27 20:35:38,201 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 20 treesize of output 14 [2024-11-27 20:35:38,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,827 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 45 treesize of output 38 [2024-11-27 20:35:38,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:35:38,851 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 60 treesize of output 55 [2024-11-27 20:35:38,863 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 23 treesize of output 11 [2024-11-27 20:36:00,786 WARN L286 SmtUtils]: Spent 18.86s on a formula simplification that was a NOOP. DAG size: 895 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 20:36:00,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:36:00,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 390 treesize of output 2062