./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.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_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/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_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/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_16ee558c-cc11-485d-9a99-85aedf6415af/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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:58:30,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:58:30,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 12:58:30,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:58:30,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:58:30,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:58:30,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:58:30,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:58:30,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:58:30,238 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:58:30,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:58:30,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:58:30,238 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:58:30,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:58:30,239 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:58:30,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:58:30,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:58:30,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:58:30,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:58:30,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:58:30,240 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:58:30,241 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:58:30,241 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:58:30,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:58:30,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:58:30,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:58:30,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:58:30,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:58:30,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:58:30,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:58:30,243 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_16ee558c-cc11-485d-9a99-85aedf6415af/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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-13 12:58:30,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:58:30,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:58:30,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:58:30,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:58:30,616 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:58:30,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i Unable to find full path for "g++" [2024-11-13 12:58:33,069 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:58:33,513 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:58:33,518 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-13 12:58:33,549 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/76e5d33f9/408f5404e18140c6afc2d0d27ed3f8cc/FLAG5082f804d [2024-11-13 12:58:33,670 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/76e5d33f9/408f5404e18140c6afc2d0d27ed3f8cc [2024-11-13 12:58:33,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:58:33,676 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:58:33,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:58:33,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:58:33,684 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:58:33,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:58:33" (1/1) ... [2024-11-13 12:58:33,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711d9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:33, skipping insertion in model container [2024-11-13 12:58:33,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:58:33" (1/1) ... [2024-11-13 12:58:33,758 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:58:34,466 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:34,467 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:34,467 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:34,469 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:34,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:58:34,586 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 12:58:34,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@295d689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:34, skipping insertion in model container [2024-11-13 12:58:34,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:58:34,588 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-13 12:58:34,591 INFO L158 Benchmark]: Toolchain (without parser) took 915.25ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 72.7MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:58:34,591 INFO L158 Benchmark]: CDTParser took 0.84ms. Allocated memory is still 83.9MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:58:34,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 910.27ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 72.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:58:34,594 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84ms. Allocated memory is still 83.9MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 910.27ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 72.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/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_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/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_16ee558c-cc11-485d-9a99-85aedf6415af/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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:58:37,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:58:37,928 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-13 12:58:37,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:58:37,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:58:38,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:58:38,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:58:38,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:58:38,006 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:58:38,007 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:58:38,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:58:38,008 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:58:38,009 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:58:38,009 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:58:38,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:58:38,010 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:58:38,011 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:58:38,011 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:58:38,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:58:38,011 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:58:38,011 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 12:58:38,012 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:58:38,012 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 12:58:38,012 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:58:38,012 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:58:38,013 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:58:38,013 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:58:38,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:58:38,013 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:58:38,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:58:38,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:58:38,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:58:38,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:58:38,015 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 12:58:38,015 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 12:58:38,015 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:58:38,015 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:58:38,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:58:38,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:58:38,016 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_16ee558c-cc11-485d-9a99-85aedf6415af/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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-13 12:58:38,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:58:38,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:58:38,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:58:38,508 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:58:38,509 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:58:38,510 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i Unable to find full path for "g++" [2024-11-13 12:58:40,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:58:41,398 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:58:41,400 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-13 12:58:41,434 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/505a73a0a/eb131b1dbbe24c0095e81b95e357c73f/FLAG8f1e23e79 [2024-11-13 12:58:41,466 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/data/505a73a0a/eb131b1dbbe24c0095e81b95e357c73f [2024-11-13 12:58:41,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:58:41,474 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:58:41,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:58:41,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:58:41,483 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:58:41,484 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:58:41" (1/1) ... [2024-11-13 12:58:41,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2021db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:41, skipping insertion in model container [2024-11-13 12:58:41,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:58:41" (1/1) ... [2024-11-13 12:58:41,555 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:58:42,202 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,203 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,203 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,204 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:58:42,327 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-13 12:58:42,344 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:58:42,425 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,426 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,426 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,427 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:58:42,507 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:58:42,558 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,558 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,559 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,559 WARN L1684 CHandler]: Possible shadowing of function new [2024-11-13 12:58:42,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:58:42,695 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:58:42,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42 WrapperNode [2024-11-13 12:58:42,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:58:42,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:58:42,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:58:42,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:58:42,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,752 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,820 INFO L138 Inliner]: procedures = 287, calls = 159, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 325 [2024-11-13 12:58:42,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:58:42,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:58:42,825 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:58:42,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:58:42,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,843 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,897 INFO L175 MemorySlicer]: Split 133 memory accesses to 4 slices as follows [2, 8, 121, 2]. 91 percent of accesses are in the largest equivalence class. The 110 initializations are split as follows [2, 8, 100, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2024-11-13 12:58:42,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:58:42,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:58:42,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:58:42,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:58:42,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (1/1) ... [2024-11-13 12:58:42,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:58:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:43,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:58:43,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:58:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 12:58:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 12:58:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-13 12:58:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-13 12:58:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:58:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 12:58:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 12:58:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 12:58:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-13 12:58:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 12:58:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#0 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#1 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#2 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#3 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-13 12:58:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-13 12:58:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-13 12:58:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-13 12:58:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-13 12:58:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-13 12:58:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-13 12:58:43,072 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-13 12:58:43,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:58:43,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:58:43,075 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 12:58:43,373 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:58:43,376 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:58:44,980 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 12:58:44,981 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:58:48,907 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:58:48,911 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-13 12:58:48,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:58:48 BoogieIcfgContainer [2024-11-13 12:58:48,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:58:48,917 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:58:48,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:58:48,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:58:48,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:58:41" (1/3) ... [2024-11-13 12:58:48,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d455277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:58:48, skipping insertion in model container [2024-11-13 12:58:48,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:58:42" (2/3) ... [2024-11-13 12:58:48,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d455277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:58:48, skipping insertion in model container [2024-11-13 12:58:48,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:58:48" (3/3) ... [2024-11-13 12:58:48,933 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2024-11-13 12:58:48,960 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:58:48,962 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing-deref.i that has 2 procedures, 115 locations, 1 initial locations, 11 loop locations, and 48 error locations. [2024-11-13 12:58:48,963 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 12:58:49,143 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-13 12:58:49,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 273 flow [2024-11-13 12:58:49,340 INFO L124 PetriNetUnfolderBase]: 18/145 cut-off events. [2024-11-13 12:58:49,344 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 12:58:49,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 18/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 530 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2024-11-13 12:58:49,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 133 transitions, 273 flow [2024-11-13 12:58:49,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 133 transitions, 273 flow [2024-11-13 12:58:49,381 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:58:49,402 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;@6f3baec4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:58:49,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-13 12:58:49,428 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 12:58:49,428 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 12:58:49,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 12:58:49,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:49,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 12:58:49,431 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:49,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash 889521, now seen corresponding path program 1 times [2024-11-13 12:58:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:49,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889347107] [2024-11-13 12:58:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:49,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:49,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:49,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:58:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:50,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:58:50,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:50,189 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 12:58:50,189 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:50,190 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:50,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889347107] [2024-11-13 12:58:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889347107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:50,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:50,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:58:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343884534] [2024-11-13 12:58:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:50,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:50,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:50,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:50,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:50,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-13 12:58:50,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:50,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:50,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-13 12:58:50,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:51,404 INFO L124 PetriNetUnfolderBase]: 125/490 cut-off events. [2024-11-13 12:58:51,404 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-13 12:58:51,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 490 events. 125/490 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2675 event pairs, 64 based on Foata normal form. 52/431 useless extension candidates. Maximal degree in co-relation 675. Up to 177 conditions per place. [2024-11-13 12:58:51,415 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 66 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-11-13 12:58:51,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 425 flow [2024-11-13 12:58:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:58:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2024-11-13 12:58:51,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7048872180451128 [2024-11-13 12:58:51,449 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 273 flow. Second operand 4 states and 375 transitions. [2024-11-13 12:58:51,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 425 flow [2024-11-13 12:58:51,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 12:58:51,463 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 253 flow [2024-11-13 12:58:51,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2024-11-13 12:58:51,471 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-13 12:58:51,472 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 253 flow [2024-11-13 12:58:51,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:51,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:51,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 12:58:51,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:58:51,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:51,678 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:51,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 889522, now seen corresponding path program 1 times [2024-11-13 12:58:51,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:51,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466879976] [2024-11-13 12:58:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:51,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:58:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:52,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:58:52,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:52,441 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 12:58:52,441 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:52,441 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:52,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466879976] [2024-11-13 12:58:52,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466879976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:52,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:52,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:58:52,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675804987] [2024-11-13 12:58:52,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:52,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:52,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:52,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:52,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:52,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2024-11-13 12:58:52,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:52,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2024-11-13 12:58:52,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:53,546 INFO L124 PetriNetUnfolderBase]: 127/521 cut-off events. [2024-11-13 12:58:53,546 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2024-11-13 12:58:53,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 521 events. 127/521 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2796 event pairs, 105 based on Foata normal form. 3/410 useless extension candidates. Maximal degree in co-relation 743. Up to 274 conditions per place. [2024-11-13 12:58:53,552 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 47 selfloop transitions, 5 changer transitions 0/120 dead transitions. [2024-11-13 12:58:53,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 371 flow [2024-11-13 12:58:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:58:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2024-11-13 12:58:53,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2024-11-13 12:58:53,555 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 4 states and 343 transitions. [2024-11-13 12:58:53,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 371 flow [2024-11-13 12:58:53,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 120 transitions, 359 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 12:58:53,561 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 286 flow [2024-11-13 12:58:53,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-11-13 12:58:53,562 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-13 12:58:53,562 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 286 flow [2024-11-13 12:58:53,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:53,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:53,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:58:53,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:53,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:53,768 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:53,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 730760848, now seen corresponding path program 1 times [2024-11-13 12:58:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628472342] [2024-11-13 12:58:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:53,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:53,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:58:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:54,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:58:54,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:54,358 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 12:58:54,371 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 12:58:54,371 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:54,372 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628472342] [2024-11-13 12:58:54,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628472342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:54,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:54,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:58:54,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914641016] [2024-11-13 12:58:54,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:54,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:58:54,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:58:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:58:54,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-13 12:58:54,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:54,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:54,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-13 12:58:54,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:55,054 INFO L124 PetriNetUnfolderBase]: 127/520 cut-off events. [2024-11-13 12:58:55,055 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2024-11-13 12:58:55,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 520 events. 127/520 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2810 event pairs, 105 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 811. Up to 270 conditions per place. [2024-11-13 12:58:55,060 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 45 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-13 12:58:55,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 380 flow [2024-11-13 12:58:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:58:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:58:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-13 12:58:55,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-13 12:58:55,063 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 286 flow. Second operand 3 states and 270 transitions. [2024-11-13 12:58:55,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 380 flow [2024-11-13 12:58:55,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:58:55,069 INFO L231 Difference]: Finished difference. Result has 119 places, 119 transitions, 287 flow [2024-11-13 12:58:55,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=119, PETRI_TRANSITIONS=119} [2024-11-13 12:58:55,070 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-13 12:58:55,070 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 119 transitions, 287 flow [2024-11-13 12:58:55,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:55,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:55,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:58:55,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:55,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:55,272 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:55,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 730760849, now seen corresponding path program 1 times [2024-11-13 12:58:55,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:55,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391483869] [2024-11-13 12:58:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:55,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:55,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:55,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:55,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:58:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:55,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:58:55,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:55,780 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 12:58:55,804 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 12:58:55,804 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:55,804 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391483869] [2024-11-13 12:58:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391483869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:55,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:55,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:58:55,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946602693] [2024-11-13 12:58:55,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:55,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:58:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:58:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:58:56,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-13 12:58:56,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 119 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:56,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:56,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-13 12:58:56,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:56,568 INFO L124 PetriNetUnfolderBase]: 127/519 cut-off events. [2024-11-13 12:58:56,568 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2024-11-13 12:58:56,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 519 events. 127/519 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2810 event pairs, 105 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 810. Up to 270 conditions per place. [2024-11-13 12:58:56,573 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 45 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2024-11-13 12:58:56,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 118 transitions, 381 flow [2024-11-13 12:58:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:58:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:58:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-13 12:58:56,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-13 12:58:56,576 INFO L175 Difference]: Start difference. First operand has 119 places, 119 transitions, 287 flow. Second operand 3 states and 270 transitions. [2024-11-13 12:58:56,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 118 transitions, 381 flow [2024-11-13 12:58:56,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 12:58:56,580 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2024-11-13 12:58:56,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2024-11-13 12:58:56,582 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2024-11-13 12:58:56,582 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2024-11-13 12:58:56,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:56,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:56,583 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 12:58:56,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:56,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:56,784 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:56,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1178754869, now seen corresponding path program 1 times [2024-11-13 12:58:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746557984] [2024-11-13 12:58:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:56,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:56,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:56,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:58:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:57,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 12:58:57,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:57,327 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 12:58:57,327 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:57,327 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746557984] [2024-11-13 12:58:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746557984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:57,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:57,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:58:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385828462] [2024-11-13 12:58:57,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:57,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:58:57,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:57,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:58:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:58:57,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-13 12:58:57,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-13 12:58:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:57,818 INFO L124 PetriNetUnfolderBase]: 126/541 cut-off events. [2024-11-13 12:58:57,818 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2024-11-13 12:58:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 541 events. 126/541 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2814 event pairs, 105 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 841. Up to 270 conditions per place. [2024-11-13 12:58:57,822 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 49 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-13 12:58:57,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 401 flow [2024-11-13 12:58:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:58:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:58:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-13 12:58:57,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-11-13 12:58:57,825 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 278 transitions. [2024-11-13 12:58:57,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 401 flow [2024-11-13 12:58:57,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 12:58:57,829 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 290 flow [2024-11-13 12:58:57,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2024-11-13 12:58:57,831 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-13 12:58:57,831 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 290 flow [2024-11-13 12:58:57,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:57,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:57,832 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:57,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:58,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:58,032 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:58,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1178750728, now seen corresponding path program 1 times [2024-11-13 12:58:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401938160] [2024-11-13 12:58:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:58,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:58,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:58,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:58,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:58:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:58,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:58:58,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:58,575 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 12:58:58,623 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 12:58:58,623 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:58:58,623 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:58:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401938160] [2024-11-13 12:58:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401938160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:58:58,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:58:58,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:58:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879123594] [2024-11-13 12:58:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:58:58,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:58:58,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:58:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:58:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:58:59,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-13 12:58:59,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:59,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:59,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-13 12:58:59,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:59,620 INFO L124 PetriNetUnfolderBase]: 126/537 cut-off events. [2024-11-13 12:58:59,620 INFO L125 PetriNetUnfolderBase]: For 33/34 co-relation queries the response was YES. [2024-11-13 12:58:59,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 537 events. 126/537 cut-off events. For 33/34 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2790 event pairs, 105 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 837. Up to 274 conditions per place. [2024-11-13 12:58:59,624 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2024-11-13 12:58:59,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 116 transitions, 386 flow [2024-11-13 12:58:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:58:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:58:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2024-11-13 12:58:59,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-11-13 12:58:59,627 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 290 flow. Second operand 4 states and 332 transitions. [2024-11-13 12:58:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 116 transitions, 386 flow [2024-11-13 12:58:59,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:58:59,635 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 291 flow [2024-11-13 12:58:59,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2024-11-13 12:58:59,636 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-13 12:58:59,636 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 291 flow [2024-11-13 12:58:59,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:59,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:59,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:59,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:58:59,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:59,838 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:58:59,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1178750727, now seen corresponding path program 1 times [2024-11-13 12:58:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:58:59,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504534716] [2024-11-13 12:58:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:59,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:59,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:59:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:00,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:59:00,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:00,283 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 12:59:00,360 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 12:59:00,360 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:00,360 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:00,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504534716] [2024-11-13 12:59:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504534716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:59:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198046620] [2024-11-13 12:59:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:00,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:59:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:59:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:59:00,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-13 12:59:00,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:00,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:00,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-13 12:59:00,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:01,113 INFO L124 PetriNetUnfolderBase]: 126/533 cut-off events. [2024-11-13 12:59:01,114 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2024-11-13 12:59:01,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 533 events. 126/533 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2787 event pairs, 105 based on Foata normal form. 2/417 useless extension candidates. Maximal degree in co-relation 841. Up to 272 conditions per place. [2024-11-13 12:59:01,118 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 43 selfloop transitions, 7 changer transitions 0/114 dead transitions. [2024-11-13 12:59:01,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 114 transitions, 387 flow [2024-11-13 12:59:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:59:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 12:59:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2024-11-13 12:59:01,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909774436090226 [2024-11-13 12:59:01,126 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 291 flow. Second operand 5 states and 393 transitions. [2024-11-13 12:59:01,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 114 transitions, 387 flow [2024-11-13 12:59:01,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 12:59:01,131 INFO L231 Difference]: Finished difference. Result has 118 places, 114 transitions, 293 flow [2024-11-13 12:59:01,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=118, PETRI_TRANSITIONS=114} [2024-11-13 12:59:01,132 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2024-11-13 12:59:01,133 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 114 transitions, 293 flow [2024-11-13 12:59:01,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:01,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:01,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:01,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:01,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:01,334 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:01,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1091888300, now seen corresponding path program 1 times [2024-11-13 12:59:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816604329] [2024-11-13 12:59:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:01,341 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:01,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:59:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:01,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:59:01,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:01,930 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-13 12:59:01,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2024-11-13 12:59:02,039 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 12:59:02,039 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:02,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:02,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816604329] [2024-11-13 12:59:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816604329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:02,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:02,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:59:02,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071713945] [2024-11-13 12:59:02,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:02,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:59:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:59:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:59:02,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-13 12:59:02,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 114 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:02,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:02,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-13 12:59:02,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:03,264 INFO L124 PetriNetUnfolderBase]: 125/503 cut-off events. [2024-11-13 12:59:03,265 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2024-11-13 12:59:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 503 events. 125/503 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2636 event pairs, 64 based on Foata normal form. 2/397 useless extension candidates. Maximal degree in co-relation 816. Up to 184 conditions per place. [2024-11-13 12:59:03,268 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 69 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2024-11-13 12:59:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 135 transitions, 483 flow [2024-11-13 12:59:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:59:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:59:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2024-11-13 12:59:03,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-11-13 12:59:03,271 INFO L175 Difference]: Start difference. First operand has 118 places, 114 transitions, 293 flow. Second operand 4 states and 348 transitions. [2024-11-13 12:59:03,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 135 transitions, 483 flow [2024-11-13 12:59:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 135 transitions, 469 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 12:59:03,274 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 285 flow [2024-11-13 12:59:03,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2024-11-13 12:59:03,275 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2024-11-13 12:59:03,275 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 285 flow [2024-11-13 12:59:03,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:03,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:03,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:03,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:59:03,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:03,477 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:03,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1091888299, now seen corresponding path program 1 times [2024-11-13 12:59:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400735662] [2024-11-13 12:59:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:03,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:03,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:03,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:03,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:59:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:03,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:59:03,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:04,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 12:59:04,144 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 12:59:04,253 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 12:59:04,253 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:04,253 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:04,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400735662] [2024-11-13 12:59:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400735662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:04,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:04,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:59:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711687679] [2024-11-13 12:59:04,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:04,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:59:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:59:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:59:04,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-13 12:59:04,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:04,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:04,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-13 12:59:04,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:05,595 INFO L124 PetriNetUnfolderBase]: 128/561 cut-off events. [2024-11-13 12:59:05,595 INFO L125 PetriNetUnfolderBase]: For 52/53 co-relation queries the response was YES. [2024-11-13 12:59:05,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 561 events. 128/561 cut-off events. For 52/53 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3043 event pairs, 106 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 857. Up to 281 conditions per place. [2024-11-13 12:59:05,600 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-13 12:59:05,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 431 flow [2024-11-13 12:59:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:59:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:59:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2024-11-13 12:59:05,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6409774436090225 [2024-11-13 12:59:05,603 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 285 flow. Second operand 4 states and 341 transitions. [2024-11-13 12:59:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 431 flow [2024-11-13 12:59:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 415 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 12:59:05,607 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 321 flow [2024-11-13 12:59:05,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2024-11-13 12:59:05,609 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-13 12:59:05,611 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 321 flow [2024-11-13 12:59:05,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:05,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:05,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:05,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:05,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:05,812 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:05,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 511202043, now seen corresponding path program 1 times [2024-11-13 12:59:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633610432] [2024-11-13 12:59:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:05,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:05,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:05,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:59:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:06,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 12:59:06,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:06,508 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 12:59:06,552 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 12:59:06,642 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 12:59:06,672 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 12:59:06,811 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 12:59:06,811 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 12:59:06,848 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-13 12:59:06,848 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 12:59:06,954 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 12:59:06,981 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 12:59:07,065 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 12:59:07,087 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 12:59:07,158 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 12:59:07,168 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 12:59:07,278 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 12:59:07,278 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:07,278 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:07,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633610432] [2024-11-13 12:59:07,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633610432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:07,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:07,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:59:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766484780] [2024-11-13 12:59:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:07,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:59:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:59:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:59:10,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2024-11-13 12:59:10,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:10,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:10,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2024-11-13 12:59:10,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:11,390 INFO L124 PetriNetUnfolderBase]: 128/560 cut-off events. [2024-11-13 12:59:11,392 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2024-11-13 12:59:11,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 560 events. 128/560 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3013 event pairs, 106 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 868. Up to 294 conditions per place. [2024-11-13 12:59:11,395 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 68 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-13 12:59:11,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 132 transitions, 517 flow [2024-11-13 12:59:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:59:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 12:59:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 695 transitions. [2024-11-13 12:59:11,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4750512645249487 [2024-11-13 12:59:11,399 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 321 flow. Second operand 11 states and 695 transitions. [2024-11-13 12:59:11,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 132 transitions, 517 flow [2024-11-13 12:59:11,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 132 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:59:11,403 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 377 flow [2024-11-13 12:59:11,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=377, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2024-11-13 12:59:11,404 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2024-11-13 12:59:11,406 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 377 flow [2024-11-13 12:59:11,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:11,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:11,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:11,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:11,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:11,608 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:11,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 511202042, now seen corresponding path program 1 times [2024-11-13 12:59:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227531901] [2024-11-13 12:59:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:11,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:11,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:11,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:59:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:12,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 12:59:12,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:12,218 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 12:59:12,304 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 12:59:12,399 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-13 12:59:12,399 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 12:59:12,453 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 12:59:12,535 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 12:59:12,579 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 12:59:12,664 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 12:59:12,664 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:12,664 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:12,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227531901] [2024-11-13 12:59:12,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227531901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:12,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:12,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:59:12,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626596365] [2024-11-13 12:59:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:12,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:59:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:59:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:59:15,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2024-11-13 12:59:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 377 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2024-11-13 12:59:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:16,891 INFO L124 PetriNetUnfolderBase]: 128/559 cut-off events. [2024-11-13 12:59:16,891 INFO L125 PetriNetUnfolderBase]: For 37/38 co-relation queries the response was YES. [2024-11-13 12:59:16,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 559 events. 128/559 cut-off events. For 37/38 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3018 event pairs, 106 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 909. Up to 290 conditions per place. [2024-11-13 12:59:16,895 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 66 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-13 12:59:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 561 flow [2024-11-13 12:59:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:59:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 12:59:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2024-11-13 12:59:16,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2024-11-13 12:59:16,901 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 377 flow. Second operand 11 states and 715 transitions. [2024-11-13 12:59:16,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 561 flow [2024-11-13 12:59:16,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 132 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 12:59:16,906 INFO L231 Difference]: Finished difference. Result has 140 places, 121 transitions, 399 flow [2024-11-13 12:59:16,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=399, PETRI_PLACES=140, PETRI_TRANSITIONS=121} [2024-11-13 12:59:16,908 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 22 predicate places. [2024-11-13 12:59:16,909 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 121 transitions, 399 flow [2024-11-13 12:59:16,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:16,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:16,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:16,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:17,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:17,111 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:17,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1332605020, now seen corresponding path program 1 times [2024-11-13 12:59:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805670910] [2024-11-13 12:59:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:17,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:17,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:17,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:17,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:59:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:17,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:59:17,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:17,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 12:59:17,674 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 12:59:17,675 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:17,675 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:17,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805670910] [2024-11-13 12:59:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805670910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:17,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:17,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:59:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207263013] [2024-11-13 12:59:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:17,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:59:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:59:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:59:18,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 133 [2024-11-13 12:59:18,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 121 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:18,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:18,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 133 [2024-11-13 12:59:18,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:18,496 INFO L124 PetriNetUnfolderBase]: 127/549 cut-off events. [2024-11-13 12:59:18,496 INFO L125 PetriNetUnfolderBase]: For 70/71 co-relation queries the response was YES. [2024-11-13 12:59:18,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 549 events. 127/549 cut-off events. For 70/71 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2934 event pairs, 105 based on Foata normal form. 8/444 useless extension candidates. Maximal degree in co-relation 893. Up to 271 conditions per place. [2024-11-13 12:59:18,500 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-13 12:59:18,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 119 transitions, 505 flow [2024-11-13 12:59:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:59:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:59:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2024-11-13 12:59:18,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2024-11-13 12:59:18,503 INFO L175 Difference]: Start difference. First operand has 140 places, 121 transitions, 399 flow. Second operand 4 states and 338 transitions. [2024-11-13 12:59:18,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 119 transitions, 505 flow [2024-11-13 12:59:18,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 119 transitions, 483 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-13 12:59:18,507 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 391 flow [2024-11-13 12:59:18,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2024-11-13 12:59:18,509 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2024-11-13 12:59:18,509 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 391 flow [2024-11-13 12:59:18,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:18,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:18,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:18,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:59:18,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:18,713 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:18,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1332605021, now seen corresponding path program 1 times [2024-11-13 12:59:18,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:18,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953747546] [2024-11-13 12:59:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:18,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:18,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:59:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:19,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:59:19,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:19,193 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 12:59:19,193 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:59:19,194 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953747546] [2024-11-13 12:59:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953747546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:59:19,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:59:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:59:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241389100] [2024-11-13 12:59:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:59:19,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:59:19,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:59:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:59:19,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-13 12:59:19,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 119 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:19,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:19,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-13 12:59:19,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:20,105 INFO L124 PetriNetUnfolderBase]: 127/541 cut-off events. [2024-11-13 12:59:20,105 INFO L125 PetriNetUnfolderBase]: For 56/57 co-relation queries the response was YES. [2024-11-13 12:59:20,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 541 events. 127/541 cut-off events. For 56/57 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2893 event pairs, 105 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 905. Up to 273 conditions per place. [2024-11-13 12:59:20,110 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 49 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-11-13 12:59:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 117 transitions, 507 flow [2024-11-13 12:59:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:59:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 12:59:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-11-13 12:59:20,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5939849624060151 [2024-11-13 12:59:20,113 INFO L175 Difference]: Start difference. First operand has 131 places, 119 transitions, 391 flow. Second operand 5 states and 395 transitions. [2024-11-13 12:59:20,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 117 transitions, 507 flow [2024-11-13 12:59:20,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 117 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 12:59:20,119 INFO L231 Difference]: Finished difference. Result has 130 places, 117 transitions, 391 flow [2024-11-13 12:59:20,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2024-11-13 12:59:20,121 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 12 predicate places. [2024-11-13 12:59:20,121 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 391 flow [2024-11-13 12:59:20,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:20,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:20,122 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:20,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:59:20,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:20,323 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:20,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1138595144, now seen corresponding path program 1 times [2024-11-13 12:59:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:20,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669473458] [2024-11-13 12:59:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:20,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:20,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:59:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:20,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:59:20,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:20,848 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 12:59:20,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:20,891 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 12:59:20,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:20,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669473458] [2024-11-13 12:59:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669473458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:20,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:59:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-13 12:59:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047324542] [2024-11-13 12:59:20,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:20,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:59:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:59:20,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:59:20,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-13 12:59:20,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:20,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:20,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-13 12:59:20,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:21,557 INFO L124 PetriNetUnfolderBase]: 127/591 cut-off events. [2024-11-13 12:59:21,557 INFO L125 PetriNetUnfolderBase]: For 154/155 co-relation queries the response was YES. [2024-11-13 12:59:21,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 591 events. 127/591 cut-off events. For 154/155 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3042 event pairs, 105 based on Foata normal form. 6/488 useless extension candidates. Maximal degree in co-relation 1026. Up to 267 conditions per place. [2024-11-13 12:59:21,562 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 63 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-11-13 12:59:21,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 136 transitions, 667 flow [2024-11-13 12:59:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:59:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 12:59:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2024-11-13 12:59:21,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.650375939849624 [2024-11-13 12:59:21,565 INFO L175 Difference]: Start difference. First operand has 130 places, 117 transitions, 391 flow. Second operand 6 states and 519 transitions. [2024-11-13 12:59:21,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 136 transitions, 667 flow [2024-11-13 12:59:21,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 136 transitions, 613 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 12:59:21,570 INFO L231 Difference]: Finished difference. Result has 135 places, 122 transitions, 455 flow [2024-11-13 12:59:21,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2024-11-13 12:59:21,571 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 17 predicate places. [2024-11-13 12:59:21,571 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 455 flow [2024-11-13 12:59:21,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:21,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:21,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:21,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 12:59:21,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:21,772 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:21,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1641280664, now seen corresponding path program 1 times [2024-11-13 12:59:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703510163] [2024-11-13 12:59:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:21,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:59:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:22,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-13 12:59:22,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:22,291 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 12:59:22,707 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 12:59:22,721 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 12:59:22,839 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-13 12:59:22,840 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 12:59:22,913 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-13 12:59:22,914 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 12:59:23,007 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 12:59:23,031 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 12:59:23,130 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 12:59:23,151 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 12:59:23,199 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 12:59:23,211 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 12:59:23,282 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 12:59:23,339 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 12:59:23,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:23,595 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-13 12:59:23,674 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-13 12:59:24,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,185 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 12:59:24,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,219 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 12:59:24,234 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 12:59:24,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,350 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 12:59:24,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,369 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 12:59:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 12:59:24,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,414 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 12:59:24,423 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 12:59:24,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:24,464 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 12:59:27,158 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2024-11-13 12:59:27,158 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 12:59:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-13 12:59:28,116 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703510163] [2024-11-13 12:59:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703510163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:28,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:59:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-13 12:59:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763917354] [2024-11-13 12:59:28,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:28,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:59:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:59:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=329, Unknown=2, NotChecked=74, Total=462 [2024-11-13 12:59:28,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 133 [2024-11-13 12:59:28,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 455 flow. Second operand has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:28,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:28,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 133 [2024-11-13 12:59:28,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:35,219 INFO L124 PetriNetUnfolderBase]: 465/1265 cut-off events. [2024-11-13 12:59:35,219 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-13 12:59:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 1265 events. 465/1265 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7529 event pairs, 422 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 2438. Up to 955 conditions per place. [2024-11-13 12:59:35,227 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 85 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-11-13 12:59:35,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 133 transitions, 721 flow [2024-11-13 12:59:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:59:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 12:59:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-11-13 12:59:35,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.20247046186895812 [2024-11-13 12:59:35,231 INFO L175 Difference]: Start difference. First operand has 135 places, 122 transitions, 455 flow. Second operand 14 states and 377 transitions. [2024-11-13 12:59:35,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 133 transitions, 721 flow [2024-11-13 12:59:35,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 133 transitions, 705 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 12:59:35,240 INFO L231 Difference]: Finished difference. Result has 150 places, 129 transitions, 537 flow [2024-11-13 12:59:35,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=537, PETRI_PLACES=150, PETRI_TRANSITIONS=129} [2024-11-13 12:59:35,242 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 32 predicate places. [2024-11-13 12:59:35,242 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 129 transitions, 537 flow [2024-11-13 12:59:35,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:35,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:35,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:35,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:59:35,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:35,443 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 12:59:35,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1641280663, now seen corresponding path program 1 times [2024-11-13 12:59:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:59:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421585657] [2024-11-13 12:59:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:35,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:35,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:59:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:35,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 12:59:35,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:36,161 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 12:59:36,279 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-13 12:59:36,279 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 12:59:36,366 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 12:59:36,449 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 12:59:36,490 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 12:59:36,549 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 12:59:36,626 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 12:59:36,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:36,733 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_677) |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 12:59:36,761 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_677) |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 12:59:36,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:36,940 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 12:59:36,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:36,965 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 12:59:36,978 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 12:59:47,777 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2024-11-13 12:59:47,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2024-11-13 12:59:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-13 12:59:48,314 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:59:48,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421585657] [2024-11-13 12:59:48,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421585657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:48,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:59:48,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-13 12:59:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655874686] [2024-11-13 12:59:48,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:48,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 12:59:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:59:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 12:59:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=222, Unknown=9, NotChecked=62, Total=342 [2024-11-13 12:59:49,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 12:59:52,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 12:59:57,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 12:59:57,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 133 [2024-11-13 12:59:57,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 129 transitions, 537 flow. Second operand has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:57,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:57,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 133 [2024-11-13 12:59:57,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:00,816 INFO L124 PetriNetUnfolderBase]: 329/1031 cut-off events. [2024-11-13 13:00:00,817 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-13 13:00:00,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1031 events. 329/1031 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6079 event pairs, 292 based on Foata normal form. 6/806 useless extension candidates. Maximal degree in co-relation 1998. Up to 679 conditions per place. [2024-11-13 13:00:00,826 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 76 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-11-13 13:00:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 132 transitions, 751 flow [2024-11-13 13:00:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:00:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 13:00:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 446 transitions. [2024-11-13 13:00:00,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2794486215538847 [2024-11-13 13:00:00,830 INFO L175 Difference]: Start difference. First operand has 150 places, 129 transitions, 537 flow. Second operand 12 states and 446 transitions. [2024-11-13 13:00:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 132 transitions, 751 flow [2024-11-13 13:00:00,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 132 transitions, 714 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-13 13:00:00,836 INFO L231 Difference]: Finished difference. Result has 158 places, 129 transitions, 561 flow [2024-11-13 13:00:00,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=561, PETRI_PLACES=158, PETRI_TRANSITIONS=129} [2024-11-13 13:00:00,837 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 40 predicate places. [2024-11-13 13:00:00,837 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 129 transitions, 561 flow [2024-11-13 13:00:00,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:00,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:00,838 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-13 13:00:00,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 13:00:01,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:01,039 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 13:00:01,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1851706869, now seen corresponding path program 2 times [2024-11-13 13:00:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:00:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471509208] [2024-11-13 13:00:01,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:00:01,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:01,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:01,042 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:01,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:00:01,749 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:00:01,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:01,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:00:01,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:01,922 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 13:00:01,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:02,165 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 13:00:02,165 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:00:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471509208] [2024-11-13 13:00:02,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471509208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:02,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:00:02,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 13:00:02,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995742811] [2024-11-13 13:00:02,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:02,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:00:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:00:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:00:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:00:02,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-13 13:00:02,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 129 transitions, 561 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:02,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:02,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-13 13:00:02,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:03,838 INFO L124 PetriNetUnfolderBase]: 127/699 cut-off events. [2024-11-13 13:00:03,838 INFO L125 PetriNetUnfolderBase]: For 535/536 co-relation queries the response was YES. [2024-11-13 13:00:03,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 699 events. 127/699 cut-off events. For 535/536 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2988 event pairs, 105 based on Foata normal form. 12/609 useless extension candidates. Maximal degree in co-relation 1544. Up to 267 conditions per place. [2024-11-13 13:00:03,844 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 93 selfloop transitions, 23 changer transitions 0/181 dead transitions. [2024-11-13 13:00:03,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 1277 flow [2024-11-13 13:00:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:00:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 13:00:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1008 transitions. [2024-11-13 13:00:03,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-11-13 13:00:03,848 INFO L175 Difference]: Start difference. First operand has 158 places, 129 transitions, 561 flow. Second operand 12 states and 1008 transitions. [2024-11-13 13:00:03,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 1277 flow [2024-11-13 13:00:03,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 1121 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-13 13:00:03,857 INFO L231 Difference]: Finished difference. Result has 165 places, 142 transitions, 762 flow [2024-11-13 13:00:03,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=762, PETRI_PLACES=165, PETRI_TRANSITIONS=142} [2024-11-13 13:00:03,858 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 47 predicate places. [2024-11-13 13:00:03,858 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 142 transitions, 762 flow [2024-11-13 13:00:03,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:03,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:03,860 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-13 13:00:03,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 13:00:04,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:04,061 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-13 13:00:04,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:04,062 INFO L85 PathProgramCache]: Analyzing trace with hash 295157781, now seen corresponding path program 3 times [2024-11-13 13:00:04,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:00:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191596634] [2024-11-13 13:00:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:00:04,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:04,067 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:04,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16ee558c-cc11-485d-9a99-85aedf6415af/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process