./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:22:43,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:22:43,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:22:43,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:22:43,326 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:22:43,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:22:43,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:22:43,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:22:43,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:22:43,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:22:43,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:22:43,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:22:43,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:22:43,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:22:43,352 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:22:43,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:22:43,352 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:22:43,353 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:22:43,354 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:43,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:43,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:43,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:22:43,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:22:43,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:22:43,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:22:43,356 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:22:43,356 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:22:43,356 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_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-11-28 02:22:43,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:22:43,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:22:43,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:22:43,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:22:43,704 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:22:43,706 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-28 02:22:46,723 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/3172151eb/bdbdbd8e4584407ab17e056bfbf42106/FLAGa3f42e912 [2024-11-28 02:22:47,190 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:22:47,191 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-28 02:22:47,222 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/3172151eb/bdbdbd8e4584407ab17e056bfbf42106/FLAGa3f42e912 [2024-11-28 02:22:47,248 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/3172151eb/bdbdbd8e4584407ab17e056bfbf42106 [2024-11-28 02:22:47,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:22:47,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:22:47,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:47,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:22:47,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:22:47,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:47" (1/1) ... [2024-11-28 02:22:47,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613a7dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:47, skipping insertion in model container [2024-11-28 02:22:47,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:47" (1/1) ... [2024-11-28 02:22:47,324 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:22:48,015 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:48,017 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:48,018 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:48,019 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:48,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:48,117 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-11-28 02:22:48,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fa5c3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:48, skipping insertion in model container [2024-11-28 02:22:48,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:48,119 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 02:22:48,121 INFO L158 Benchmark]: Toolchain (without parser) took 865.99ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 75.1MB in the end (delta: 16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:22:48,122 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 167.8MB. Free memory is still 103.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:22:48,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 863.07ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 75.1MB in the end (delta: 16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:22:48,126 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 167.8MB. Free memory is still 103.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 863.07ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 75.1MB in the end (delta: 16.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1031]: 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_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:22:50,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:22:50,776 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 02:22:50,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:22:50,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:22:50,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:22:50,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:22:50,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:22:50,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:22:50,836 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:22:50,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:22:50,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:22:50,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:22:50,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:22:50,839 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:22:50,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:22:50,840 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:22:50,841 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:22:50,842 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:22:50,842 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:50,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:50,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:50,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:22:50,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:22:50,844 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_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-11-28 02:22:51,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:22:51,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:22:51,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:22:51,201 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:22:51,201 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:22:51,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-28 02:22:54,280 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/bff0f17ef/a960aa8f3bda4233a634ddfa518fc6a2/FLAG8dbed4457 [2024-11-28 02:22:54,706 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:22:54,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-11-28 02:22:54,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/bff0f17ef/a960aa8f3bda4233a634ddfa518fc6a2/FLAG8dbed4457 [2024-11-28 02:22:54,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/data/bff0f17ef/a960aa8f3bda4233a634ddfa518fc6a2 [2024-11-28 02:22:54,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:22:54,762 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:22:54,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:54,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:22:54,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:22:54,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:54" (1/1) ... [2024-11-28 02:22:54,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0d3007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:54, skipping insertion in model container [2024-11-28 02:22:54,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:54" (1/1) ... [2024-11-28 02:22:54,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:22:55,494 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,495 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,496 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,497 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:55,589 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 02:22:55,608 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:22:55,670 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,671 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,671 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,671 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:55,705 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:22:55,768 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,768 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,768 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,769 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 02:22:55,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:55,900 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:22:55,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55 WrapperNode [2024-11-28 02:22:55,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:55,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:22:55,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:22:55,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:22:55,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,992 INFO L138 Inliner]: procedures = 274, calls = 95, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 177 [2024-11-28 02:22:55,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:22:55,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:22:55,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:22:55,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:22:56,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,014 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,037 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2024-11-28 02:22:56,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,052 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,053 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:22:56,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:22:56,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:22:56,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:22:56,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:56,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:22:56,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:22:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 02:22:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-28 02:22:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-28 02:22:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 02:22:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 02:22:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 02:22:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-28 02:22:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-28 02:22:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-28 02:22:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:22:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:22:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 02:22:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:22:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:22:56,172 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:22:56,380 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:22:56,382 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:22:57,308 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:22:57,308 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:22:59,108 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:22:59,108 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:22:59,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:22:59 BoogieIcfgContainer [2024-11-28 02:22:59,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:22:59,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:22:59,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:22:59,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:22:59,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:22:54" (1/3) ... [2024-11-28 02:22:59,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd107f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:22:59, skipping insertion in model container [2024-11-28 02:22:59,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (2/3) ... [2024-11-28 02:22:59,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd107f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:22:59, skipping insertion in model container [2024-11-28 02:22:59,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:22:59" (3/3) ... [2024-11-28 02:22:59,121 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_21-arrayloop2_nr.i [2024-11-28 02:22:59,136 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:22:59,141 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_21-arrayloop2_nr.i that has 2 procedures, 60 locations, 1 initial locations, 4 loop locations, and 29 error locations. [2024-11-28 02:22:59,141 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:22:59,248 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 02:22:59,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2024-11-28 02:22:59,359 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2024-11-28 02:22:59,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:22:59,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 332 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-28 02:22:59,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2024-11-28 02:22:59,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2024-11-28 02:22:59,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:22:59,399 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;@3273990f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:22:59,400 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-28 02:22:59,412 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:22:59,412 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-28 02:22:59,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:22:59,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:22:59,413 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:22:59,414 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:22:59,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash 489959, now seen corresponding path program 1 times [2024-11-28 02:22:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:22:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747113164] [2024-11-28 02:22:59,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:22:59,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:59,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:59,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:22:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:22:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:22:59,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 02:22:59,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:22:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:22:59,902 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:22:59,904 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:22:59,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747113164] [2024-11-28 02:22:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747113164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:22:59,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:22:59,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:22:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967423169] [2024-11-28 02:22:59,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:22:59,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:22:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:22:59,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:22:59,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:00,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 85 [2024-11-28 02:23:00,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:00,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:00,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 85 [2024-11-28 02:23:00,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:00,905 INFO L124 PetriNetUnfolderBase]: 482/954 cut-off events. [2024-11-28 02:23:00,905 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 02:23:00,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 954 events. 482/954 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5128 event pairs, 368 based on Foata normal form. 1/856 useless extension candidates. Maximal degree in co-relation 1678. Up to 752 conditions per place. [2024-11-28 02:23:00,926 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-11-28 02:23:00,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 238 flow [2024-11-28 02:23:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-11-28 02:23:00,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638235294117647 [2024-11-28 02:23:00,945 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 217 transitions. [2024-11-28 02:23:00,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 238 flow [2024-11-28 02:23:00,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:00,959 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2024-11-28 02:23:00,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-28 02:23:00,966 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-28 02:23:00,968 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2024-11-28 02:23:00,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:00,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:00,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:23:00,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:01,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:01,173 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:01,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 489960, now seen corresponding path program 1 times [2024-11-28 02:23:01,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616090746] [2024-11-28 02:23:01,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:01,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:01,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:01,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:23:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:01,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:23:01,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:01,655 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:01,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:01,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616090746] [2024-11-28 02:23:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616090746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:01,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:23:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113203605] [2024-11-28 02:23:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:01,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:01,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:01,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:01,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-11-28 02:23:01,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:01,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:01,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-11-28 02:23:01,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:02,580 INFO L124 PetriNetUnfolderBase]: 483/959 cut-off events. [2024-11-28 02:23:02,582 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 02:23:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 959 events. 483/959 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5061 event pairs, 368 based on Foata normal form. 3/864 useless extension candidates. Maximal degree in co-relation 1718. Up to 757 conditions per place. [2024-11-28 02:23:02,593 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 38 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-11-28 02:23:02,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 266 flow [2024-11-28 02:23:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-28 02:23:02,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-11-28 02:23:02,600 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 230 transitions. [2024-11-28 02:23:02,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 266 flow [2024-11-28 02:23:02,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:02,606 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2024-11-28 02:23:02,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-28 02:23:02,608 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-28 02:23:02,609 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2024-11-28 02:23:02,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:02,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:02,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 02:23:02,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:23:02,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:02,814 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:02,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1711914373, now seen corresponding path program 1 times [2024-11-28 02:23:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450132245] [2024-11-28 02:23:02,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:02,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:23:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:03,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:23:03,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:03,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:23:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:03,246 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:03,246 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450132245] [2024-11-28 02:23:03,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450132245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:03,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:03,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:23:03,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200620720] [2024-11-28 02:23:03,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:03,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:23:03,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:03,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:23:03,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:23:03,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-11-28 02:23:03,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:03,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:03,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-11-28 02:23:03,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:03,923 INFO L124 PetriNetUnfolderBase]: 483/958 cut-off events. [2024-11-28 02:23:03,924 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 02:23:03,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 958 events. 483/958 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5046 event pairs, 368 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 1724. Up to 753 conditions per place. [2024-11-28 02:23:03,933 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-11-28 02:23:03,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 277 flow [2024-11-28 02:23:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:23:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:23:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-28 02:23:03,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-11-28 02:23:03,939 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 183 transitions. [2024-11-28 02:23:03,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 277 flow [2024-11-28 02:23:03,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:03,944 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2024-11-28 02:23:03,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-28 02:23:03,946 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-28 02:23:03,947 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2024-11-28 02:23:03,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:03,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:03,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 02:23:03,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:23:04,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:04,152 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:04,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1711914372, now seen corresponding path program 1 times [2024-11-28 02:23:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621268434] [2024-11-28 02:23:04,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:04,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:04,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:04,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:23:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:04,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:23:04,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:04,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 02:23:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:04,509 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:04,509 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621268434] [2024-11-28 02:23:04,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621268434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:04,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:04,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:23:04,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477622300] [2024-11-28 02:23:04,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:04,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:23:04,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:04,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:23:04,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:23:04,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-11-28 02:23:04,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-11-28 02:23:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:05,087 INFO L124 PetriNetUnfolderBase]: 483/957 cut-off events. [2024-11-28 02:23:05,087 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 02:23:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 957 events. 483/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5080 event pairs, 368 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 1723. Up to 753 conditions per place. [2024-11-28 02:23:05,097 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-11-28 02:23:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 278 flow [2024-11-28 02:23:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:23:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:23:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-28 02:23:05,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-11-28 02:23:05,100 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-28 02:23:05,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 278 flow [2024-11-28 02:23:05,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:05,103 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2024-11-28 02:23:05,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-28 02:23:05,104 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-11-28 02:23:05,105 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2024-11-28 02:23:05,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:05,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:05,105 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-28 02:23:05,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:05,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:05,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:05,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1529740093, now seen corresponding path program 1 times [2024-11-28 02:23:05,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:05,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682751737] [2024-11-28 02:23:05,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:05,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:05,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:23:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:05,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 02:23:05,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:05,643 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:05,643 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682751737] [2024-11-28 02:23:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682751737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:05,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861844674] [2024-11-28 02:23:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:05,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:23:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:05,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:23:05,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:23:05,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-11-28 02:23:05,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:05,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:05,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-11-28 02:23:05,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:06,103 INFO L124 PetriNetUnfolderBase]: 482/979 cut-off events. [2024-11-28 02:23:06,104 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 02:23:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 979 events. 482/979 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5079 event pairs, 368 based on Foata normal form. 2/873 useless extension candidates. Maximal degree in co-relation 1754. Up to 753 conditions per place. [2024-11-28 02:23:06,114 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 40 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-11-28 02:23:06,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 298 flow [2024-11-28 02:23:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:23:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:23:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-11-28 02:23:06,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7490196078431373 [2024-11-28 02:23:06,117 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 3 states and 191 transitions. [2024-11-28 02:23:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 298 flow [2024-11-28 02:23:06,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:06,121 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 205 flow [2024-11-28 02:23:06,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-11-28 02:23:06,123 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-28 02:23:06,124 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 205 flow [2024-11-28 02:23:06,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:06,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:06,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:06,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:06,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:06,325 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:06,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1529738488, now seen corresponding path program 1 times [2024-11-28 02:23:06,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:06,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370900762] [2024-11-28 02:23:06,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:06,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:06,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:06,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:23:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:06,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:23:06,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:06,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:23:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:06,706 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:06,706 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:06,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370900762] [2024-11-28 02:23:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370900762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:06,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:06,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951523387] [2024-11-28 02:23:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:06,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:06,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:06,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:06,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2024-11-28 02:23:06,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:06,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:06,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2024-11-28 02:23:06,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:07,385 INFO L124 PetriNetUnfolderBase]: 482/975 cut-off events. [2024-11-28 02:23:07,385 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-28 02:23:07,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 975 events. 482/975 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5074 event pairs, 368 based on Foata normal form. 2/873 useless extension candidates. Maximal degree in co-relation 1750. Up to 757 conditions per place. [2024-11-28 02:23:07,392 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-11-28 02:23:07,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 283 flow [2024-11-28 02:23:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-11-28 02:23:07,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441176470588236 [2024-11-28 02:23:07,395 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 205 flow. Second operand 4 states and 219 transitions. [2024-11-28 02:23:07,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 283 flow [2024-11-28 02:23:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:07,398 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 206 flow [2024-11-28 02:23:07,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-11-28 02:23:07,399 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-28 02:23:07,399 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 206 flow [2024-11-28 02:23:07,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:07,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:07,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:07,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:23:07,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:07,600 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:07,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1529738487, now seen corresponding path program 1 times [2024-11-28 02:23:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496856705] [2024-11-28 02:23:07,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:07,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:07,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:07,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:23:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:07,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 02:23:07,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:07,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 02:23:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:07,896 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:07,896 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:07,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496856705] [2024-11-28 02:23:07,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496856705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:07,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:07,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:07,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399275026] [2024-11-28 02:23:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:07,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:07,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:07,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:07,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:08,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 85 [2024-11-28 02:23:08,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 85 [2024-11-28 02:23:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:08,525 INFO L124 PetriNetUnfolderBase]: 482/971 cut-off events. [2024-11-28 02:23:08,525 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 02:23:08,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 971 events. 482/971 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5061 event pairs, 368 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 1754. Up to 755 conditions per place. [2024-11-28 02:23:08,532 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-28 02:23:08,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 284 flow [2024-11-28 02:23:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:23:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:23:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-11-28 02:23:08,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5976470588235294 [2024-11-28 02:23:08,536 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 206 flow. Second operand 5 states and 254 transitions. [2024-11-28 02:23:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 284 flow [2024-11-28 02:23:08,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:08,540 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 208 flow [2024-11-28 02:23:08,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-28 02:23:08,542 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-11-28 02:23:08,542 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 208 flow [2024-11-28 02:23:08,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:08,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:08,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:08,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:23:08,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:08,744 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:08,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1199884184, now seen corresponding path program 1 times [2024-11-28 02:23:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580875877] [2024-11-28 02:23:08,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:08,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:08,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:23:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:09,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:23:09,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:09,198 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 02:23:09,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 02:23:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:09,250 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:09,250 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580875877] [2024-11-28 02:23:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580875877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:09,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:23:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567867791] [2024-11-28 02:23:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:09,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:09,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:09,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:09,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-11-28 02:23:09,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:09,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-11-28 02:23:09,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:09,860 INFO L124 PetriNetUnfolderBase]: 482/967 cut-off events. [2024-11-28 02:23:09,861 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-28 02:23:09,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 967 events. 482/967 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5028 event pairs, 368 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 1748. Up to 755 conditions per place. [2024-11-28 02:23:09,866 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-28 02:23:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 282 flow [2024-11-28 02:23:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-28 02:23:09,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-28 02:23:09,869 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 208 flow. Second operand 4 states and 221 transitions. [2024-11-28 02:23:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 282 flow [2024-11-28 02:23:09,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 02:23:09,871 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2024-11-28 02:23:09,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-11-28 02:23:09,871 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2024-11-28 02:23:09,872 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2024-11-28 02:23:09,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:09,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:09,872 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:09,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:23:10,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:10,073 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:10,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1199884185, now seen corresponding path program 1 times [2024-11-28 02:23:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:10,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509509075] [2024-11-28 02:23:10,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:10,076 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:23:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:10,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:23:10,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:23:10,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 02:23:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:10,622 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:10,623 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:10,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509509075] [2024-11-28 02:23:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509509075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:10,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:10,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888819531] [2024-11-28 02:23:10,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:10,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:23:10,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:10,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:23:10,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:23:11,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-11-28 02:23:11,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:11,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:11,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-11-28 02:23:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:11,622 INFO L124 PetriNetUnfolderBase]: 483/997 cut-off events. [2024-11-28 02:23:11,623 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-28 02:23:11,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1829 conditions, 997 events. 483/997 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5368 event pairs, 368 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 1741. Up to 761 conditions per place. [2024-11-28 02:23:11,629 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 43 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-11-28 02:23:11,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 324 flow [2024-11-28 02:23:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-28 02:23:11,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2024-11-28 02:23:11,632 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 231 transitions. [2024-11-28 02:23:11,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 324 flow [2024-11-28 02:23:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:11,634 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2024-11-28 02:23:11,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-28 02:23:11,635 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-28 02:23:11,635 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2024-11-28 02:23:11,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:11,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:11,636 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:11,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:23:11,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:11,837 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:11,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1458295394, now seen corresponding path program 1 times [2024-11-28 02:23:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859427693] [2024-11-28 02:23:11,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:11,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:11,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:11,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:23:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:12,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 02:23:12,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:12,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:23:12,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:23:12,402 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 [2024-11-28 02:23:12,420 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 [2024-11-28 02:23:12,542 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 02:23:12,542 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 [2024-11-28 02:23:12,567 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:23:12,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 02:23:12,645 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 [2024-11-28 02:23:12,673 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 [2024-11-28 02:23:12,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:23:12,751 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 [2024-11-28 02:23:12,796 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 [2024-11-28 02:23:12,804 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 [2024-11-28 02:23:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:12,909 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:12,909 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859427693] [2024-11-28 02:23:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859427693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:12,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:12,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:23:12,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901501133] [2024-11-28 02:23:12,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:12,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:23:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:12,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:23:12,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:23:14,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 85 [2024-11-28 02:23:14,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:14,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:14,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 85 [2024-11-28 02:23:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:15,209 INFO L124 PetriNetUnfolderBase]: 483/996 cut-off events. [2024-11-28 02:23:15,209 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-28 02:23:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 996 events. 483/996 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5348 event pairs, 368 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 1775. Up to 774 conditions per place. [2024-11-28 02:23:15,216 INFO L140 encePairwiseOnDemand]: 74/85 looper letters, 59 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-11-28 02:23:15,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 412 flow [2024-11-28 02:23:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:23:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:23:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 379 transitions. [2024-11-28 02:23:15,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44588235294117645 [2024-11-28 02:23:15,219 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 10 states and 379 transitions. [2024-11-28 02:23:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 412 flow [2024-11-28 02:23:15,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:15,222 INFO L231 Difference]: Finished difference. Result has 94 places, 83 transitions, 286 flow [2024-11-28 02:23:15,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2024-11-28 02:23:15,223 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2024-11-28 02:23:15,223 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 286 flow [2024-11-28 02:23:15,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:15,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:15,224 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:15,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:23:15,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:15,424 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:15,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1458295395, now seen corresponding path program 1 times [2024-11-28 02:23:15,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:15,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756368065] [2024-11-28 02:23:15,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:15,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:15,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:15,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:15,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:23:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:15,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 02:23:15,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:15,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:23:15,876 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 [2024-11-28 02:23:15,929 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:23:15,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 02:23:15,977 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 [2024-11-28 02:23:16,026 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 [2024-11-28 02:23:16,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:23:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:16,110 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:16,111 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756368065] [2024-11-28 02:23:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756368065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:23:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381027299] [2024-11-28 02:23:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:16,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:23:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:16,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:23:16,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:23:18,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2024-11-28 02:23:18,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:18,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:18,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2024-11-28 02:23:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:19,250 INFO L124 PetriNetUnfolderBase]: 483/995 cut-off events. [2024-11-28 02:23:19,250 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-28 02:23:19,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 995 events. 483/995 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5370 event pairs, 368 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 1813. Up to 770 conditions per place. [2024-11-28 02:23:19,258 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-28 02:23:19,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 450 flow [2024-11-28 02:23:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:23:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:23:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2024-11-28 02:23:19,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2024-11-28 02:23:19,262 INFO L175 Difference]: Start difference. First operand has 94 places, 83 transitions, 286 flow. Second operand 11 states and 430 transitions. [2024-11-28 02:23:19,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 450 flow [2024-11-28 02:23:19,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 95 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:19,265 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 312 flow [2024-11-28 02:23:19,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=312, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2024-11-28 02:23:19,266 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 19 predicate places. [2024-11-28 02:23:19,267 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 312 flow [2024-11-28 02:23:19,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:19,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:19,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:19,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:23:19,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:19,468 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:19,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2037483477, now seen corresponding path program 1 times [2024-11-28 02:23:19,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400075018] [2024-11-28 02:23:19,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:19,472 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:19,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:23:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:19,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:23:19,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:19,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 02:23:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:19,801 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:19,801 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400075018] [2024-11-28 02:23:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400075018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:19,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:19,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:19,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463891406] [2024-11-28 02:23:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:19,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:19,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:19,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:20,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2024-11-28 02:23:20,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:20,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:20,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2024-11-28 02:23:20,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:20,397 INFO L124 PetriNetUnfolderBase]: 483/987 cut-off events. [2024-11-28 02:23:20,397 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-28 02:23:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 987 events. 483/987 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5308 event pairs, 368 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 1804. Up to 754 conditions per place. [2024-11-28 02:23:20,406 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 39 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-28 02:23:20,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 404 flow [2024-11-28 02:23:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-11-28 02:23:20,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441176470588236 [2024-11-28 02:23:20,408 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 312 flow. Second operand 4 states and 219 transitions. [2024-11-28 02:23:20,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 404 flow [2024-11-28 02:23:20,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-28 02:23:20,414 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2024-11-28 02:23:20,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-11-28 02:23:20,415 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-28 02:23:20,418 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2024-11-28 02:23:20,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:20,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:20,418 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:20,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:23:20,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:20,619 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:20,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2037483478, now seen corresponding path program 1 times [2024-11-28 02:23:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:20,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900973534] [2024-11-28 02:23:20,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:20,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:20,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:20,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:23:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:20,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:23:20,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:20,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:23:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:20,963 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:23:20,963 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:20,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900973534] [2024-11-28 02:23:20,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900973534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:20,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:20,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:23:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873539057] [2024-11-28 02:23:20,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:20,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:20,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:20,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:21,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2024-11-28 02:23:21,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:21,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:21,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2024-11-28 02:23:21,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:21,542 INFO L124 PetriNetUnfolderBase]: 483/979 cut-off events. [2024-11-28 02:23:21,542 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-28 02:23:21,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 979 events. 483/979 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5218 event pairs, 368 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 1797. Up to 754 conditions per place. [2024-11-28 02:23:21,549 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-11-28 02:23:21,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 80 transitions, 394 flow [2024-11-28 02:23:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2024-11-28 02:23:21,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-11-28 02:23:21,552 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 4 states and 225 transitions. [2024-11-28 02:23:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 80 transitions, 394 flow [2024-11-28 02:23:21,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:21,555 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 302 flow [2024-11-28 02:23:21,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-11-28 02:23:21,556 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-28 02:23:21,556 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 302 flow [2024-11-28 02:23:21,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:21,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:21,557 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:21,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:23:21,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:21,758 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:21,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1467063877, now seen corresponding path program 1 times [2024-11-28 02:23:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:21,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823810191] [2024-11-28 02:23:21,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:21,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:21,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:21,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:23:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:22,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:23:22,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:22,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:22,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823810191] [2024-11-28 02:23:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823810191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:22,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:23:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-28 02:23:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024835533] [2024-11-28 02:23:22,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:22,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:23:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:22,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:23:22,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:23:22,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-11-28 02:23:22,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:22,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:22,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-11-28 02:23:22,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:22,633 INFO L124 PetriNetUnfolderBase]: 483/1029 cut-off events. [2024-11-28 02:23:22,633 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-11-28 02:23:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1029 events. 483/1029 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5237 event pairs, 368 based on Foata normal form. 6/942 useless extension candidates. Maximal degree in co-relation 1923. Up to 750 conditions per place. [2024-11-28 02:23:22,645 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-11-28 02:23:22,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 554 flow [2024-11-28 02:23:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:23:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:23:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 354 transitions. [2024-11-28 02:23:22,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2024-11-28 02:23:22,648 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 302 flow. Second operand 6 states and 354 transitions. [2024-11-28 02:23:22,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 554 flow [2024-11-28 02:23:22,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 510 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:22,652 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2024-11-28 02:23:22,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-11-28 02:23:22,654 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2024-11-28 02:23:22,654 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2024-11-28 02:23:22,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:22,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:22,655 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:22,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:22,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:22,856 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:22,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 239816287, now seen corresponding path program 1 times [2024-11-28 02:23:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:22,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784479517] [2024-11-28 02:23:22,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:22,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:22,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:22,859 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:22,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:23:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:23,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:23:23,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:23,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 02:23:23,480 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 [2024-11-28 02:23:23,567 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-28 02:23:23,568 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 [2024-11-28 02:23:23,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-28 02:23:23,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-28 02:23:23,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-28 02:23:23,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 02:23:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:23,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:24,075 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_574) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-28 02:23:24,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:24,299 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 [2024-11-28 02:23:24,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:24,325 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 [2024-11-28 02:23:24,337 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 [2024-11-28 02:23:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-28 02:23:26,614 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784479517] [2024-11-28 02:23:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784479517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:26,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:23:26,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 02:23:26,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150473424] [2024-11-28 02:23:26,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:26,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:23:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:26,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:23:26,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=218, Unknown=10, NotChecked=30, Total=306 [2024-11-28 02:23:27,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 85 [2024-11-28 02:23:27,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 370 flow. Second operand has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:27,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:27,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 85 [2024-11-28 02:23:27,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:29,984 INFO L124 PetriNetUnfolderBase]: 1518/2685 cut-off events. [2024-11-28 02:23:29,984 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-28 02:23:29,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 2685 events. 1518/2685 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15307 event pairs, 1287 based on Foata normal form. 0/1901 useless extension candidates. Maximal degree in co-relation 5218. Up to 2340 conditions per place. [2024-11-28 02:23:30,000 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 62 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-11-28 02:23:30,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 582 flow [2024-11-28 02:23:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:23:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:23:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-11-28 02:23:30,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2160427807486631 [2024-11-28 02:23:30,003 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 370 flow. Second operand 11 states and 202 transitions. [2024-11-28 02:23:30,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 582 flow [2024-11-28 02:23:30,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 96 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:30,007 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 444 flow [2024-11-28 02:23:30,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2024-11-28 02:23:30,008 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2024-11-28 02:23:30,008 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 444 flow [2024-11-28 02:23:30,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:30,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:30,009 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:30,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:30,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:30,209 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:30,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash 239816288, now seen corresponding path program 1 times [2024-11-28 02:23:30,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:30,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128021946] [2024-11-28 02:23:30,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:30,212 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:30,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:23:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:30,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:23:30,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:30,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:23:30,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 02:23:30,930 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 [2024-11-28 02:23:30,937 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 [2024-11-28 02:23:31,025 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-28 02:23:31,026 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 [2024-11-28 02:23:31,083 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-28 02:23:31,083 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 [2024-11-28 02:23:31,146 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 [2024-11-28 02:23:31,162 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 [2024-11-28 02:23:31,230 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 [2024-11-28 02:23:31,240 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 [2024-11-28 02:23:31,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-28 02:23:31,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:23:31,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 02:23:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:31,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:31,592 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-28 02:23:31,645 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-11-28 02:23:31,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:31,896 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 [2024-11-28 02:23:31,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:31,912 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 [2024-11-28 02:23:31,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:31,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2024-11-28 02:23:31,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:31,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 113 [2024-11-28 02:23:32,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-28 02:23:32,021 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 [2024-11-28 02:23:32,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:32,816 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 [2024-11-28 02:23:32,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:23:32,846 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 [2024-11-28 02:23:32,861 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 [2024-11-28 02:23:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-28 02:23:36,629 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:36,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128021946] [2024-11-28 02:23:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128021946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:36,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:23:36,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 02:23:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602288274] [2024-11-28 02:23:36,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:36,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:23:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:36,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:23:36,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=5, NotChecked=58, Total=306 [2024-11-28 02:23:37,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 85 [2024-11-28 02:23:37,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 90 transitions, 444 flow. Second operand has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:37,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:37,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 85 [2024-11-28 02:23:37,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:41,951 INFO L124 PetriNetUnfolderBase]: 2199/3496 cut-off events. [2024-11-28 02:23:41,951 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-11-28 02:23:41,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 3496 events. 2199/3496 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18214 event pairs, 1920 based on Foata normal form. 6/2092 useless extension candidates. Maximal degree in co-relation 7153. Up to 3399 conditions per place. [2024-11-28 02:23:41,964 INFO L140 encePairwiseOnDemand]: 75/85 looper letters, 65 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-11-28 02:23:41,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 640 flow [2024-11-28 02:23:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:23:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 02:23:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-11-28 02:23:41,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13846153846153847 [2024-11-28 02:23:41,967 INFO L175 Difference]: Start difference. First operand has 111 places, 90 transitions, 444 flow. Second operand 13 states and 153 transitions. [2024-11-28 02:23:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 640 flow [2024-11-28 02:23:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 610 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-28 02:23:41,972 INFO L231 Difference]: Finished difference. Result has 122 places, 92 transitions, 480 flow [2024-11-28 02:23:41,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=122, PETRI_TRANSITIONS=92} [2024-11-28 02:23:41,973 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2024-11-28 02:23:41,973 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 92 transitions, 480 flow [2024-11-28 02:23:41,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:41,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:41,974 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-28 02:23:41,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:23:42,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:42,174 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:42,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -553195843, now seen corresponding path program 2 times [2024-11-28 02:23:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224825830] [2024-11-28 02:23:42,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:42,177 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:42,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:23:43,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:43,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:43,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:23:43,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:43,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:44,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:23:44,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224825830] [2024-11-28 02:23:44,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224825830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:44,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:23:44,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-28 02:23:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503897286] [2024-11-28 02:23:44,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:44,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:23:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:23:44,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:23:44,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:23:44,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-11-28 02:23:44,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 92 transitions, 480 flow. Second operand has 12 states, 12 states have (on average 53.916666666666664) internal successors, (647), 12 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:44,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:44,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-11-28 02:23:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:45,351 INFO L124 PetriNetUnfolderBase]: 483/1137 cut-off events. [2024-11-28 02:23:45,351 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-11-28 02:23:45,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1137 events. 483/1137 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5202 event pairs, 368 based on Foata normal form. 12/1063 useless extension candidates. Maximal degree in co-relation 2483. Up to 750 conditions per place. [2024-11-28 02:23:45,357 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 84 selfloop transitions, 23 changer transitions 0/144 dead transitions. [2024-11-28 02:23:45,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 144 transitions, 1210 flow [2024-11-28 02:23:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:23:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 02:23:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 687 transitions. [2024-11-28 02:23:45,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6735294117647059 [2024-11-28 02:23:45,360 INFO L175 Difference]: Start difference. First operand has 122 places, 92 transitions, 480 flow. Second operand 12 states and 687 transitions. [2024-11-28 02:23:45,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 144 transitions, 1210 flow [2024-11-28 02:23:45,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1058 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-28 02:23:45,367 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 687 flow [2024-11-28 02:23:45,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2024-11-28 02:23:45,368 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2024-11-28 02:23:45,368 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 687 flow [2024-11-28 02:23:45,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.916666666666664) internal successors, (647), 12 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:45,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:45,369 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-28 02:23:45,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:23:45,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:45,569 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-28 02:23:45,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1485783043, now seen corresponding path program 3 times [2024-11-28 02:23:45,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:23:45,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626596789] [2024-11-28 02:23:45,572 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:45,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:45,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:45,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74927b96-b015-4ca3-ba96-2fb45d3b6381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process