./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd --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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:20:07,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:20:07,304 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 13:20:07,312 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:20:07,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:20:07,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:20:07,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:20:07,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:20:07,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:20:07,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:20:07,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:20:07,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:20:07,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:20:07,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:20:07,365 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:20:07,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:20:07,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:20:07,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:20:07,368 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:20:07,369 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:20:07,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:20:07,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:20:07,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:20:07,371 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_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd 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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-11-13 13:20:07,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:20:07,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:20:07,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:20:07,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:20:07,785 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:20:07,787 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i Unable to find full path for "g++" [2024-11-13 13:20:09,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:20:10,280 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:20:10,281 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-11-13 13:20:10,300 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/21c9ae572/05968354fe5940209358102a3599fc13/FLAGf8b17fabb [2024-11-13 13:20:10,318 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/21c9ae572/05968354fe5940209358102a3599fc13 [2024-11-13 13:20:10,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:20:10,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:20:10,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:20:10,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:20:10,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:20:10,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:20:10" (1/1) ... [2024-11-13 13:20:10,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260eff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:10, skipping insertion in model container [2024-11-13 13:20:10,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:20:10" (1/1) ... [2024-11-13 13:20:10,380 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:20:10,866 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:10,866 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:10,866 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:10,867 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:10,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:20:10,946 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) [2024-11-13 13:20:10,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b7a0bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:10, skipping insertion in model container [2024-11-13 13:20:10,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:20:10,947 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-13 13:20:10,949 INFO L158 Benchmark]: Toolchain (without parser) took 626.35ms. Allocated memory is still 142.6MB. Free memory was 115.5MB in the beginning and 98.8MB in the end (delta: 16.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:20:10,950 INFO L158 Benchmark]: CDTParser took 1.24ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:20:10,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.28ms. Allocated memory is still 142.6MB. Free memory was 115.4MB in the beginning and 98.8MB in the end (delta: 16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:20:10,952 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.24ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.28ms. Allocated memory is still 142.6MB. Free memory was 115.4MB in the beginning and 98.8MB in the end (delta: 16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd --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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:20:13,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:20:13,896 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-13 13:20:13,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:20:13,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:20:13,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:20:13,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:20:13,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:20:13,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:20:13,945 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:20:13,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:20:13,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:20:13,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:20:13,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:20:13,947 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:20:13,947 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:20:13,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:20:13,949 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:20:13,950 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:20:13,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:20:13,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:20:13,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:20:13,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:20:13,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:20:13,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:20:13,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:20:13,951 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 13:20:13,951 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 13:20:13,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:20:13,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:20:13,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:20:13,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:20:13,952 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_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd 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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-11-13 13:20:14,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:20:14,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:20:14,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:20:14,340 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:20:14,341 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:20:14,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i Unable to find full path for "g++" [2024-11-13 13:20:16,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:20:16,837 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:20:16,838 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-11-13 13:20:16,856 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/00993ff32/cd27b3a3fb3f460882df1b257497e807/FLAG775cf71d9 [2024-11-13 13:20:16,873 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/data/00993ff32/cd27b3a3fb3f460882df1b257497e807 [2024-11-13 13:20:16,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:20:16,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:20:16,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:20:16,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:20:16,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:20:16,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:20:16" (1/1) ... [2024-11-13 13:20:16,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6833de18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:16, skipping insertion in model container [2024-11-13 13:20:16,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:20:16" (1/1) ... [2024-11-13 13:20:16,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:20:17,505 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,506 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,508 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,510 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:20:17,625 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-13 13:20:17,643 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:20:17,713 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,713 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,714 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,715 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:20:17,763 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:20:17,822 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,822 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,822 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,823 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 13:20:17,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:20:17,916 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:20:17,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17 WrapperNode [2024-11-13 13:20:17,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:20:17,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:20:17,917 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:20:17,917 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:20:17,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:17,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,016 INFO L138 Inliner]: procedures = 279, calls = 131, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 244 [2024-11-13 13:20:18,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:20:18,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:20:18,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:20:18,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:20:18,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,067 INFO L175 MemorySlicer]: Split 116 memory accesses to 1 slices as follows [116]. 100 percent of accesses are in the largest equivalence class. The 100 initializations are split as follows [100]. The 10 writes are split as follows [10]. [2024-11-13 13:20:18,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:20:18,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:20:18,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:20:18,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:20:18,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (1/1) ... [2024-11-13 13:20:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:20:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:18,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:20:18,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:20:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 13:20:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-13 13:20:18,166 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 13:20:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:20:18,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:20:18,169 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:20:18,359 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:20:18,361 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:20:19,375 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:20:19,376 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:20:22,341 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:20:22,341 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 13:20:22,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:20:22 BoogieIcfgContainer [2024-11-13 13:20:22,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:20:22,345 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:20:22,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:20:22,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:20:22,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:20:16" (1/3) ... [2024-11-13 13:20:22,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f35d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:20:22, skipping insertion in model container [2024-11-13 13:20:22,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:20:17" (2/3) ... [2024-11-13 13:20:22,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f35d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:20:22, skipping insertion in model container [2024-11-13 13:20:22,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:20:22" (3/3) ... [2024-11-13 13:20:22,353 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2024-11-13 13:20:22,373 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:20:22,374 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_24-evilcollapse_nr.i that has 2 procedures, 68 locations, 1 initial locations, 4 loop locations, and 33 error locations. [2024-11-13 13:20:22,375 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:20:22,482 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 13:20:22,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 196 flow [2024-11-13 13:20:22,592 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2024-11-13 13:20:22,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:20:22,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 7/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-13 13:20:22,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 94 transitions, 196 flow [2024-11-13 13:20:22,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 190 flow [2024-11-13 13:20:22,617 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:20:22,635 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;@4884e4a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:20:22,638 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2024-11-13 13:20:22,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:20:22,650 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 13:20:22,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:20:22,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:22,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:20:22,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:22,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash 678561, now seen corresponding path program 1 times [2024-11-13 13:20:22,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:22,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631908118] [2024-11-13 13:20:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:22,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:22,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:20:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:23,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:20:23,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:23,183 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:23,184 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631908118] [2024-11-13 13:20:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631908118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:23,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:23,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:20:23,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421282526] [2024-11-13 13:20:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:23,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:23,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 94 [2024-11-13 13:20:23,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 190 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) [2024-11-13 13:20:23,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:23,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 94 [2024-11-13 13:20:23,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:24,067 INFO L124 PetriNetUnfolderBase]: 483/961 cut-off events. [2024-11-13 13:20:24,067 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 13:20:24,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 961 events. 483/961 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5084 event pairs, 368 based on Foata normal form. 1/862 useless extension candidates. Maximal degree in co-relation 1678. Up to 757 conditions per place. [2024-11-13 13:20:24,082 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-11-13 13:20:24,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 262 flow [2024-11-13 13:20:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 232 transitions. [2024-11-13 13:20:24,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-11-13 13:20:24,104 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 190 flow. Second operand 4 states and 232 transitions. [2024-11-13 13:20:24,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 262 flow [2024-11-13 13:20:24,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:20:24,118 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 182 flow [2024-11-13 13:20:24,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-11-13 13:20:24,124 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-11-13 13:20:24,124 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 182 flow [2024-11-13 13:20:24,124 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) [2024-11-13 13:20:24,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:24,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:20:24,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 13:20:24,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:24,325 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:24,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash 678562, now seen corresponding path program 1 times [2024-11-13 13:20:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472447054] [2024-11-13 13:20:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:24,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:24,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:24,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:24,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:20:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:24,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 13:20:24,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:24,841 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:24,841 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472447054] [2024-11-13 13:20:24,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472447054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:24,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:24,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:20:24,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602654915] [2024-11-13 13:20:24,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:24,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:24,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:25,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-13 13:20:25,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:25,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:25,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-13 13:20:25,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:25,825 INFO L124 PetriNetUnfolderBase]: 484/966 cut-off events. [2024-11-13 13:20:25,825 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:20:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1758 conditions, 966 events. 484/966 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5032 event pairs, 368 based on Foata normal form. 3/870 useless extension candidates. Maximal degree in co-relation 1730. Up to 762 conditions per place. [2024-11-13 13:20:25,839 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 43 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2024-11-13 13:20:25,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 290 flow [2024-11-13 13:20:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2024-11-13 13:20:25,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6675531914893617 [2024-11-13 13:20:25,846 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 182 flow. Second operand 4 states and 251 transitions. [2024-11-13 13:20:25,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 290 flow [2024-11-13 13:20:25,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 280 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:20:25,853 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 215 flow [2024-11-13 13:20:25,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-11-13 13:20:25,854 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-11-13 13:20:25,854 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 215 flow [2024-11-13 13:20:25,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:25,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:25,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 13:20:25,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:20:26,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:26,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:26,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1259193711, now seen corresponding path program 1 times [2024-11-13 13:20:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:26,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722942002] [2024-11-13 13:20:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:26,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:26,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:26,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:20:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:26,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:20:26,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:26,502 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 [2024-11-13 13:20:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:26,511 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:26,511 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722942002] [2024-11-13 13:20:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722942002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:26,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:26,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:20:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797581208] [2024-11-13 13:20:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:26,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:20:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:20:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:20:26,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-11-13 13:20:26,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:26,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:26,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-11-13 13:20:26,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:27,079 INFO L124 PetriNetUnfolderBase]: 484/965 cut-off events. [2024-11-13 13:20:27,079 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 13:20:27,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 965 events. 484/965 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5018 event pairs, 368 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 1736. Up to 758 conditions per place. [2024-11-13 13:20:27,087 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2024-11-13 13:20:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 301 flow [2024-11-13 13:20:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:20:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:20:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-13 13:20:27,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-11-13 13:20:27,092 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 215 flow. Second operand 3 states and 200 transitions. [2024-11-13 13:20:27,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 301 flow [2024-11-13 13:20:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:20:27,097 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 216 flow [2024-11-13 13:20:27,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-11-13 13:20:27,099 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-11-13 13:20:27,099 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 216 flow [2024-11-13 13:20:27,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:27,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:27,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 13:20:27,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 13:20:27,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:27,300 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:27,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1259193710, now seen corresponding path program 1 times [2024-11-13 13:20:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:27,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974179679] [2024-11-13 13:20:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:27,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:27,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:27,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:20:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:27,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:20:27,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:27,717 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 [2024-11-13 13:20:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:27,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:27,731 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974179679] [2024-11-13 13:20:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974179679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:27,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:27,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:20:27,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571542473] [2024-11-13 13:20:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:27,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:20:27,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:20:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:20:27,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-11-13 13:20:27,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:27,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:27,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-11-13 13:20:27,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:28,346 INFO L124 PetriNetUnfolderBase]: 484/964 cut-off events. [2024-11-13 13:20:28,347 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 13:20:28,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 964 events. 484/964 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5009 event pairs, 368 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1735. Up to 758 conditions per place. [2024-11-13 13:20:28,353 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-11-13 13:20:28,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 302 flow [2024-11-13 13:20:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:20:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:20:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-13 13:20:28,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-11-13 13:20:28,355 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 216 flow. Second operand 3 states and 200 transitions. [2024-11-13 13:20:28,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 302 flow [2024-11-13 13:20:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:20:28,357 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 214 flow [2024-11-13 13:20:28,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-11-13 13:20:28,358 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2024-11-13 13:20:28,359 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 214 flow [2024-11-13 13:20:28,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:28,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:28,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:28,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 13:20:28,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:28,563 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:28,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -380298691, now seen corresponding path program 1 times [2024-11-13 13:20:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955556315] [2024-11-13 13:20:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:28,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:28,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:20:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:28,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:20:28,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:28,916 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 [2024-11-13 13:20:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:28,963 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:28,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:28,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955556315] [2024-11-13 13:20:28,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955556315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:28,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:28,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443979945] [2024-11-13 13:20:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:28,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:29,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-11-13 13:20:29,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:29,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:29,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-11-13 13:20:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:29,716 INFO L124 PetriNetUnfolderBase]: 484/962 cut-off events. [2024-11-13 13:20:29,716 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 13:20:29,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 962 events. 484/962 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5006 event pairs, 368 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 1733. Up to 760 conditions per place. [2024-11-13 13:20:29,723 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 42 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-11-13 13:20:29,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 302 flow [2024-11-13 13:20:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-11-13 13:20:29,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-11-13 13:20:29,725 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 214 flow. Second operand 4 states and 240 transitions. [2024-11-13 13:20:29,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 302 flow [2024-11-13 13:20:29,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:20:29,727 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 212 flow [2024-11-13 13:20:29,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-11-13 13:20:29,728 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-11-13 13:20:29,728 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 212 flow [2024-11-13 13:20:29,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:29,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:29,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:29,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:20:29,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:29,929 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:29,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -380298692, now seen corresponding path program 1 times [2024-11-13 13:20:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483152833] [2024-11-13 13:20:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:29,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:29,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:29,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:20:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:30,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:20:30,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:30,311 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 [2024-11-13 13:20:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:30,324 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:30,325 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483152833] [2024-11-13 13:20:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483152833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511136338] [2024-11-13 13:20:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:30,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:30,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 94 [2024-11-13 13:20:30,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:30,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:30,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 94 [2024-11-13 13:20:30,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:30,991 INFO L124 PetriNetUnfolderBase]: 484/960 cut-off events. [2024-11-13 13:20:30,991 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:20:30,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 960 events. 484/960 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4995 event pairs, 368 based on Foata normal form. 1/866 useless extension candidates. Maximal degree in co-relation 1734. Up to 758 conditions per place. [2024-11-13 13:20:30,997 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 39 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-13 13:20:30,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 300 flow [2024-11-13 13:20:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:20:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:20:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-11-13 13:20:31,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5936170212765958 [2024-11-13 13:20:31,000 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 212 flow. Second operand 5 states and 279 transitions. [2024-11-13 13:20:31,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 300 flow [2024-11-13 13:20:31,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 292 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:20:31,002 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 214 flow [2024-11-13 13:20:31,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2024-11-13 13:20:31,003 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2024-11-13 13:20:31,003 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 214 flow [2024-11-13 13:20:31,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:31,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:31,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 13:20:31,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:20:31,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:31,207 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:31,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -380297049, now seen corresponding path program 1 times [2024-11-13 13:20:31,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:31,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135505183] [2024-11-13 13:20:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:31,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:31,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:31,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:31,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:20:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:31,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 13:20:31,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:31,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:31,513 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135505183] [2024-11-13 13:20:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135505183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:31,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:31,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477814782] [2024-11-13 13:20:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:31,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:20:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:20:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:20:31,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-13 13:20:31,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:31,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:31,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-13 13:20:31,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:31,869 INFO L124 PetriNetUnfolderBase]: 483/978 cut-off events. [2024-11-13 13:20:31,870 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 13:20:31,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 978 events. 483/978 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5024 event pairs, 368 based on Foata normal form. 2/877 useless extension candidates. Maximal degree in co-relation 1761. Up to 758 conditions per place. [2024-11-13 13:20:31,877 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 45 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-11-13 13:20:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 324 flow [2024-11-13 13:20:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:20:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:20:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-11-13 13:20:31,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7375886524822695 [2024-11-13 13:20:31,879 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 214 flow. Second operand 3 states and 208 transitions. [2024-11-13 13:20:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 324 flow [2024-11-13 13:20:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 304 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:20:31,882 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 211 flow [2024-11-13 13:20:31,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-11-13 13:20:31,883 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2024-11-13 13:20:31,883 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 211 flow [2024-11-13 13:20:31,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:31,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:31,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:31,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:20:32,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:32,085 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:32,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash -394803737, now seen corresponding path program 1 times [2024-11-13 13:20:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:32,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881225427] [2024-11-13 13:20:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:32,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:32,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:20:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:32,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 13:20:32,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:20:32,544 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 [2024-11-13 13:20:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:32,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:32,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881225427] [2024-11-13 13:20:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881225427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:32,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979252435] [2024-11-13 13:20:32,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:32,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:20:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:20:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:20:32,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-13 13:20:32,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:32,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:32,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-13 13:20:32,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:33,471 INFO L124 PetriNetUnfolderBase]: 484/1012 cut-off events. [2024-11-13 13:20:33,471 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-13 13:20:33,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 1012 events. 484/1012 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5395 event pairs, 368 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 1754. Up to 766 conditions per place. [2024-11-13 13:20:33,477 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 48 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-13 13:20:33,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 342 flow [2024-11-13 13:20:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 244 transitions. [2024-11-13 13:20:33,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-11-13 13:20:33,481 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 211 flow. Second operand 4 states and 244 transitions. [2024-11-13 13:20:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 342 flow [2024-11-13 13:20:33,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:20:33,485 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 254 flow [2024-11-13 13:20:33,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-11-13 13:20:33,486 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-11-13 13:20:33,487 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 254 flow [2024-11-13 13:20:33,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:33,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:33,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:33,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:20:33,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:33,689 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:33,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash -394803738, now seen corresponding path program 1 times [2024-11-13 13:20:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:33,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489487262] [2024-11-13 13:20:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:33,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:33,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:33,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:33,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:20:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:34,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:20:34,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:34,133 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-13 13:20:34,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-13 13:20:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:34,176 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:34,176 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:34,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489487262] [2024-11-13 13:20:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489487262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:34,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:34,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:20:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706372377] [2024-11-13 13:20:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:34,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:34,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-13 13:20:34,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:34,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-13 13:20:34,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:34,766 INFO L124 PetriNetUnfolderBase]: 484/1004 cut-off events. [2024-11-13 13:20:34,766 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-13 13:20:34,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 1004 events. 484/1004 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5340 event pairs, 368 based on Foata normal form. 4/897 useless extension candidates. Maximal degree in co-relation 1770. Up to 766 conditions per place. [2024-11-13 13:20:34,772 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 41 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-13 13:20:34,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 346 flow [2024-11-13 13:20:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2024-11-13 13:20:34,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6223404255319149 [2024-11-13 13:20:34,776 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 254 flow. Second operand 4 states and 234 transitions. [2024-11-13 13:20:34,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 346 flow [2024-11-13 13:20:34,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:20:34,779 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 262 flow [2024-11-13 13:20:34,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-11-13 13:20:34,780 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-11-13 13:20:34,780 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 262 flow [2024-11-13 13:20:34,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:34,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:34,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:34,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:20:34,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:34,981 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:34,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash 645986759, now seen corresponding path program 1 times [2024-11-13 13:20:34,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:34,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190554586] [2024-11-13 13:20:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:34,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:34,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:20:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:35,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 13:20:35,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:35,454 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 [2024-11-13 13:20:35,527 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 [2024-11-13 13:20:35,576 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-13 13:20:35,577 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 [2024-11-13 13:20:35,631 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 [2024-11-13 13:20:35,682 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 [2024-11-13 13:20:35,719 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 [2024-11-13 13:20:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:35,783 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:35,783 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:35,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190554586] [2024-11-13 13:20:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190554586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:35,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 13:20:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111543048] [2024-11-13 13:20:35,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:35,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:20:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:20:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:20:37,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 94 [2024-11-13 13:20:37,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:37,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:37,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 94 [2024-11-13 13:20:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:38,387 INFO L124 PetriNetUnfolderBase]: 484/1003 cut-off events. [2024-11-13 13:20:38,387 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-13 13:20:38,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 1003 events. 484/1003 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5298 event pairs, 368 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 1771. Up to 775 conditions per place. [2024-11-13 13:20:38,393 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 61 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2024-11-13 13:20:38,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 446 flow [2024-11-13 13:20:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:20:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:20:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 457 transitions. [2024-11-13 13:20:38,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44197292069632493 [2024-11-13 13:20:38,396 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 262 flow. Second operand 11 states and 457 transitions. [2024-11-13 13:20:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 102 transitions, 446 flow [2024-11-13 13:20:38,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 430 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:20:38,399 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 306 flow [2024-11-13 13:20:38,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2024-11-13 13:20:38,400 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2024-11-13 13:20:38,400 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 306 flow [2024-11-13 13:20:38,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:38,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:38,400 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:38,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 13:20:38,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:38,601 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:38,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 645986760, now seen corresponding path program 1 times [2024-11-13 13:20:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:38,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735685095] [2024-11-13 13:20:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:38,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:38,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 13:20:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:38,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 13:20:38,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:39,053 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 [2024-11-13 13:20:39,069 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 [2024-11-13 13:20:39,138 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 [2024-11-13 13:20:39,150 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 [2024-11-13 13:20:39,241 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:20:39,242 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 14 treesize of output 13 [2024-11-13 13:20:39,274 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-13 13:20:39,274 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 [2024-11-13 13:20:39,360 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 [2024-11-13 13:20:39,377 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 [2024-11-13 13:20:39,464 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 [2024-11-13 13:20:39,478 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 [2024-11-13 13:20:39,526 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 [2024-11-13 13:20:39,530 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 [2024-11-13 13:20:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:39,612 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:39,612 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:39,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735685095] [2024-11-13 13:20:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735685095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 13:20:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615186377] [2024-11-13 13:20:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:39,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:20:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:20:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:20:41,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 94 [2024-11-13 13:20:41,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 306 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) [2024-11-13 13:20:41,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:41,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 94 [2024-11-13 13:20:41,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:42,100 INFO L124 PetriNetUnfolderBase]: 484/1002 cut-off events. [2024-11-13 13:20:42,100 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-13 13:20:42,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 1002 events. 484/1002 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5301 event pairs, 368 based on Foata normal form. 1/908 useless extension candidates. Maximal degree in co-relation 1832. Up to 779 conditions per place. [2024-11-13 13:20:42,107 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 63 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2024-11-13 13:20:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 484 flow [2024-11-13 13:20:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:20:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:20:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 437 transitions. [2024-11-13 13:20:42,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42263056092843326 [2024-11-13 13:20:42,110 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 306 flow. Second operand 11 states and 437 transitions. [2024-11-13 13:20:42,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 484 flow [2024-11-13 13:20:42,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:20:42,114 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 328 flow [2024-11-13 13:20:42,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2024-11-13 13:20:42,115 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2024-11-13 13:20:42,115 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 328 flow [2024-11-13 13:20:42,115 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) [2024-11-13 13:20:42,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:42,115 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:42,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 13:20:42,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:42,316 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:42,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1449246301, now seen corresponding path program 1 times [2024-11-13 13:20:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949691902] [2024-11-13 13:20:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:42,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:42,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 13:20:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:42,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:20:42,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:42,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:42,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:42,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949691902] [2024-11-13 13:20:42,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949691902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:42,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:42,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:42,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39699569] [2024-11-13 13:20:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:42,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:42,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-11-13 13:20:42,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:42,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:42,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-11-13 13:20:42,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:43,214 INFO L124 PetriNetUnfolderBase]: 484/994 cut-off events. [2024-11-13 13:20:43,214 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-13 13:20:43,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 994 events. 484/994 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5271 event pairs, 368 based on Foata normal form. 0/904 useless extension candidates. Maximal degree in co-relation 1826. Up to 759 conditions per place. [2024-11-13 13:20:43,221 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 44 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-13 13:20:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 89 transitions, 430 flow [2024-11-13 13:20:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-11-13 13:20:43,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-11-13 13:20:43,223 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 328 flow. Second operand 4 states and 240 transitions. [2024-11-13 13:20:43,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 89 transitions, 430 flow [2024-11-13 13:20:43,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 89 transitions, 408 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-13 13:20:43,226 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 320 flow [2024-11-13 13:20:43,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2024-11-13 13:20:43,227 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2024-11-13 13:20:43,227 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 320 flow [2024-11-13 13:20:43,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:43,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:43,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:43,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 13:20:43,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:43,428 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:43,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1449246300, now seen corresponding path program 1 times [2024-11-13 13:20:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903834948] [2024-11-13 13:20:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:43,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:43,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:43,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 13:20:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:43,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 13:20:43,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:43,821 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 [2024-11-13 13:20:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:43,872 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:20:43,872 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:43,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903834948] [2024-11-13 13:20:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903834948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:43,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:20:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901469990] [2024-11-13 13:20:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:43,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:20:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:20:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:20:44,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2024-11-13 13:20:44,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:44,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:44,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2024-11-13 13:20:44,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:44,374 INFO L124 PetriNetUnfolderBase]: 484/986 cut-off events. [2024-11-13 13:20:44,375 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-13 13:20:44,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 986 events. 484/986 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5196 event pairs, 368 based on Foata normal form. 8/904 useless extension candidates. Maximal degree in co-relation 1818. Up to 759 conditions per place. [2024-11-13 13:20:44,382 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 42 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-13 13:20:44,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 87 transitions, 418 flow [2024-11-13 13:20:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:20:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:20:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2024-11-13 13:20:44,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-11-13 13:20:44,385 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 320 flow. Second operand 4 states and 246 transitions. [2024-11-13 13:20:44,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 87 transitions, 418 flow [2024-11-13 13:20:44,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:20:44,389 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 316 flow [2024-11-13 13:20:44,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2024-11-13 13:20:44,391 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2024-11-13 13:20:44,391 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 316 flow [2024-11-13 13:20:44,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:44,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:44,392 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:44,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 13:20:44,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:44,592 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:44,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash -829926794, now seen corresponding path program 1 times [2024-11-13 13:20:44,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:44,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490999089] [2024-11-13 13:20:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:44,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:44,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:44,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 13:20:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:44,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:20:44,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:44,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:44,983 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490999089] [2024-11-13 13:20:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490999089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:44,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:20:44,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-13 13:20:44,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263300789] [2024-11-13 13:20:44,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:44,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:20:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:20:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:20:44,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-13 13:20:44,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:44,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:44,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-13 13:20:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:45,484 INFO L124 PetriNetUnfolderBase]: 484/1036 cut-off events. [2024-11-13 13:20:45,484 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-11-13 13:20:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2015 conditions, 1036 events. 484/1036 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5242 event pairs, 368 based on Foata normal form. 6/948 useless extension candidates. Maximal degree in co-relation 1944. Up to 755 conditions per place. [2024-11-13 13:20:45,490 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 59 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-11-13 13:20:45,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 106 transitions, 578 flow [2024-11-13 13:20:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:20:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:20:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-11-13 13:20:45,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6790780141843972 [2024-11-13 13:20:45,493 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 316 flow. Second operand 6 states and 383 transitions. [2024-11-13 13:20:45,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 106 transitions, 578 flow [2024-11-13 13:20:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 534 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:20:45,496 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 384 flow [2024-11-13 13:20:45,496 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2024-11-13 13:20:45,497 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2024-11-13 13:20:45,497 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 384 flow [2024-11-13 13:20:45,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:45,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:45,498 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:45,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 13:20:45,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:45,698 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:45,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1729249689, now seen corresponding path program 1 times [2024-11-13 13:20:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:45,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817327138] [2024-11-13 13:20:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:45,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:45,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:45,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 13:20:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:46,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 13:20:46,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:46,207 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 [2024-11-13 13:20:46,520 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 [2024-11-13 13:20:46,533 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 [2024-11-13 13:20:46,613 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-13 13:20:46,613 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 22 treesize of output 29 [2024-11-13 13:20:46,668 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-13 13:20:46,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-13 13:20:46,734 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 [2024-11-13 13:20:46,745 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 34 treesize of output 27 [2024-11-13 13:20:46,802 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 34 treesize of output 27 [2024-11-13 13:20:46,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 13:20:46,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-13 13:20:46,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 13:20:46,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-13 13:20:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:46,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:47,394 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_577 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_577) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-11-13 13:20:47,493 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_49| (_ BitVec 32))) (or (forall ((v_ArrVal_577 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_572 (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#0.offset| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_578) |c_~#c~0.base|) .cse0) (_ bv8 32)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_572) (select (select (store |c_#memory_$Pointer$#0.base| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_577) |c_~#c~0.base|) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_49|))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_49| (_ BitVec 32))) (or (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |v_ULTIMATE.start_new_~p~0#1.base_49| v_ArrVal_578) |c_~#c~0.base|) .cse0))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_49|))))))) is different from false [2024-11-13 13:20:47,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,521 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 [2024-11-13 13:20:47,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,549 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 [2024-11-13 13:20:47,566 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 [2024-11-13 13:20:47,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,664 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 [2024-11-13 13:20:47,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,679 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 [2024-11-13 13:20:47,683 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:20:47,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,709 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 38 treesize of output 41 [2024-11-13 13:20:47,716 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:20:47,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:47,746 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 27 treesize of output 30 [2024-11-13 13:20:50,574 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2024-11-13 13:20:50,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2024-11-13 13:20:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-13 13:20:50,804 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:20:50,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817327138] [2024-11-13 13:20:50,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817327138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:50,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:20:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2024-11-13 13:20:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147745385] [2024-11-13 13:20:50,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:50,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:20:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:20:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:20:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=10, NotChecked=70, Total=420 [2024-11-13 13:20:50,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 94 [2024-11-13 13:20:50,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 384 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:50,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:50,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 94 [2024-11-13 13:20:50,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:56,109 INFO L124 PetriNetUnfolderBase]: 2200/3509 cut-off events. [2024-11-13 13:20:56,110 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-13 13:20:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7209 conditions, 3509 events. 2200/3509 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18284 event pairs, 1920 based on Foata normal form. 6/2095 useless extension candidates. Maximal degree in co-relation 7143. Up to 3406 conditions per place. [2024-11-13 13:20:56,130 INFO L140 encePairwiseOnDemand]: 84/94 looper letters, 73 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-11-13 13:20:56,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 103 transitions, 622 flow [2024-11-13 13:20:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:20:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 13:20:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-11-13 13:20:56,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.13175122749590834 [2024-11-13 13:20:56,134 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 384 flow. Second operand 13 states and 161 transitions. [2024-11-13 13:20:56,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 103 transitions, 622 flow [2024-11-13 13:20:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 103 transitions, 606 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 13:20:56,138 INFO L231 Difference]: Finished difference. Result has 120 places, 99 transitions, 467 flow [2024-11-13 13:20:56,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=467, PETRI_PLACES=120, PETRI_TRANSITIONS=99} [2024-11-13 13:20:56,139 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2024-11-13 13:20:56,139 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 99 transitions, 467 flow [2024-11-13 13:20:56,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:56,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:56,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:56,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 13:20:56,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:56,340 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:20:56,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1729249688, now seen corresponding path program 1 times [2024-11-13 13:20:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:20:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131798555] [2024-11-13 13:20:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:56,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:56,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:56,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:56,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 13:20:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:56,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:20:56,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:56,945 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 [2024-11-13 13:20:57,049 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-13 13:20:57,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2024-11-13 13:20:57,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-13 13:20:57,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-13 13:20:57,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-13 13:20:57,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 13:20:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:57,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:57,440 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-13 13:20:57,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:57,553 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 29 treesize of output 30 [2024-11-13 13:20:57,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:57,578 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 52 treesize of output 55 [2024-11-13 13:20:57,588 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 [2024-11-13 13:21:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:21:07,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:21:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131798555] [2024-11-13 13:21:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131798555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:21:07,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:21:07,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-13 13:21:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668504344] [2024-11-13 13:21:07,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:21:07,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:21:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:21:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:21:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=215, Unknown=13, NotChecked=30, Total=306 [2024-11-13 13:21:11,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:21:11,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 94 [2024-11-13 13:21:11,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 99 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 13.833333333333334) internal successors, (249), 18 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:21:11,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:21:11,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 94 [2024-11-13 13:21:11,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:21:15,049 INFO L124 PetriNetUnfolderBase]: 1519/2686 cut-off events. [2024-11-13 13:21:15,049 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-13 13:21:15,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5394 conditions, 2686 events. 1519/2686 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15286 event pairs, 1287 based on Foata normal form. 6/1906 useless extension candidates. Maximal degree in co-relation 5318. Up to 2347 conditions per place. [2024-11-13 13:21:15,066 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 68 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-11-13 13:21:15,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 102 transitions, 661 flow [2024-11-13 13:21:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:21:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:21:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-11-13 13:21:15,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2011605415860735 [2024-11-13 13:21:15,069 INFO L175 Difference]: Start difference. First operand has 120 places, 99 transitions, 467 flow. Second operand 11 states and 208 transitions. [2024-11-13 13:21:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 102 transitions, 661 flow [2024-11-13 13:21:15,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 102 transitions, 631 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-13 13:21:15,074 INFO L231 Difference]: Finished difference. Result has 128 places, 99 transitions, 494 flow [2024-11-13 13:21:15,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=494, PETRI_PLACES=128, PETRI_TRANSITIONS=99} [2024-11-13 13:21:15,075 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 36 predicate places. [2024-11-13 13:21:15,075 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 99 transitions, 494 flow [2024-11-13 13:21:15,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.833333333333334) internal successors, (249), 18 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:21:15,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:21:15,075 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-13 13:21:15,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 13:21:15,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:21:15,276 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:21:15,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:21:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -553133465, now seen corresponding path program 2 times [2024-11-13 13:21:15,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:21:15,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555966632] [2024-11-13 13:21:15,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:21:15,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:21:15,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:21:15,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:21:15,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:21:15,842 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:21:15,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:21:15,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:21:15,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:21:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:21:16,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:21:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:21:16,359 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:21:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555966632] [2024-11-13 13:21:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555966632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:21:16,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:21:16,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 13:21:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372094300] [2024-11-13 13:21:16,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:21:16,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:21:16,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:21:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:21:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:21:16,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-13 13:21:16,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 99 transitions, 494 flow. Second operand has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:21:16,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:21:16,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-13 13:21:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:21:18,090 INFO L124 PetriNetUnfolderBase]: 484/1144 cut-off events. [2024-11-13 13:21:18,090 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-11-13 13:21:18,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581 conditions, 1144 events. 484/1144 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5208 event pairs, 368 based on Foata normal form. 12/1069 useless extension candidates. Maximal degree in co-relation 2507. Up to 755 conditions per place. [2024-11-13 13:21:18,098 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 89 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2024-11-13 13:21:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 151 transitions, 1234 flow [2024-11-13 13:21:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:21:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 13:21:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 740 transitions. [2024-11-13 13:21:18,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-11-13 13:21:18,100 INFO L175 Difference]: Start difference. First operand has 128 places, 99 transitions, 494 flow. Second operand 12 states and 740 transitions. [2024-11-13 13:21:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 151 transitions, 1234 flow [2024-11-13 13:21:18,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1082 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-13 13:21:18,104 INFO L231 Difference]: Finished difference. Result has 136 places, 112 transitions, 701 flow [2024-11-13 13:21:18,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=701, PETRI_PLACES=136, PETRI_TRANSITIONS=112} [2024-11-13 13:21:18,105 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 44 predicate places. [2024-11-13 13:21:18,105 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 112 transitions, 701 flow [2024-11-13 13:21:18,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:21:18,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:21:18,106 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-13 13:21:18,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 13:21:18,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:21:18,306 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-11-13 13:21:18,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:21:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 594308359, now seen corresponding path program 3 times [2024-11-13 13:21:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:21:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081354919] [2024-11-13 13:21:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:21:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:21:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:21:18,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:21:18,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87541518-c7ad-4cbe-93ee-eab10171499f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process