./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.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_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/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_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/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_db712611-301f-4979-be6b-4dc594593fd8/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:51:49,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:51:50,093 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:51:50,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:51:50,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:51:50,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:51:50,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:51:50,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:51:50,136 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:51:50,136 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:51:50,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:51:50,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:51:50,137 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:51:50,137 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:51:50,138 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:51:50,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:51:50,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:51:50,140 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:51:50,141 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:51:50,141 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:51:50,141 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:51:50,141 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:51:50,141 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:51:50,142 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:50,142 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:50,142 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:50,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:50,143 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:51:50,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:50,143 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:50,143 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:50,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:50,143 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:51:50,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:51:50,144 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_db712611-301f-4979-be6b-4dc594593fd8/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 -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2024-11-28 04:51:50,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:51:50,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:51:50,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:51:50,534 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:51:50,534 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:51:50,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2024-11-28 04:51:53,616 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/74f8b3855/68850f0062ad4be5950d8208140a6acf/FLAG38a39f62e [2024-11-28 04:51:53,948 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:51:53,949 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2024-11-28 04:51:53,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/74f8b3855/68850f0062ad4be5950d8208140a6acf/FLAG38a39f62e [2024-11-28 04:51:53,983 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/74f8b3855/68850f0062ad4be5950d8208140a6acf [2024-11-28 04:51:53,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:51:53,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:51:53,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:53,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:51:53,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:51:53,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:53" (1/1) ... [2024-11-28 04:51:53,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d8ba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:53, skipping insertion in model container [2024-11-28 04:51:53,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:53" (1/1) ... [2024-11-28 04:51:54,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:51:54,532 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:51:54,533 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:51:54,534 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:51:54,536 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:51:54,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:51:54,638 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 04:51:54,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@101e63bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:54, skipping insertion in model container [2024-11-28 04:51:54,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:54,639 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 04:51:54,644 INFO L158 Benchmark]: Toolchain (without parser) took 653.46ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 73.5MB in the end (delta: 17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:51:54,644 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:51:54,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 650.70ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.5MB in the end (delta: 17.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:51:54,646 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 650.70ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.5MB in the end (delta: 17.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1058]: 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_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/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_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/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_db712611-301f-4979-be6b-4dc594593fd8/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:51:57,398 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:51:57,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 04:51:57,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:51:57,562 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:51:57,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:51:57,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:51:57,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:51:57,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:51:57,589 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:51:57,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:51:57,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:51:57,589 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:51:57,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:51:57,590 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:51:57,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:51:57,590 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:51:57,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:51:57,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:51:57,591 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:51:57,592 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:51:57,592 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:51:57,592 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:51:57,592 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:51:57,592 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:51:57,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:57,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:57,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:57,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:51:57,594 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:51:57,595 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:51:57,595 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_db712611-301f-4979-be6b-4dc594593fd8/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 -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2024-11-28 04:51:57,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:51:57,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:51:57,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:51:57,970 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:51:57,971 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:51:57,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2024-11-28 04:52:01,053 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/9ec2ac348/dce4a191fdd24b729b2694021921d2fc/FLAG94972d523 [2024-11-28 04:52:01,484 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:52:01,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2024-11-28 04:52:01,515 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/9ec2ac348/dce4a191fdd24b729b2694021921d2fc/FLAG94972d523 [2024-11-28 04:52:01,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/data/9ec2ac348/dce4a191fdd24b729b2694021921d2fc [2024-11-28 04:52:01,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:52:01,641 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:52:01,642 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:52:01,643 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:52:01,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:52:01,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:52:01" (1/1) ... [2024-11-28 04:52:01,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f06ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:01, skipping insertion in model container [2024-11-28 04:52:01,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:52:01" (1/1) ... [2024-11-28 04:52:01,709 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:52:02,199 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,199 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,200 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,200 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:52:02,296 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 04:52:02,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:52:02,377 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,378 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,379 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,380 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:52:02,448 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:52:02,523 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,523 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,524 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,524 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-28 04:52:02,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:52:02,659 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:52:02,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02 WrapperNode [2024-11-28 04:52:02,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:52:02,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:52:02,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:52:02,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:52:02,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,745 INFO L138 Inliner]: procedures = 285, calls = 126, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 292 [2024-11-28 04:52:02,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:52:02,747 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:52:02,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:52:02,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:52:02,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,798 INFO L175 MemorySlicer]: Split 98 memory accesses to 4 slices as follows [2, 89, 5, 2]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 70, 5, 0]. The 12 writes are split as follows [0, 11, 0, 1]. [2024-11-28 04:52:02,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,820 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:52:02,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:52:02,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:52:02,840 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:52:02,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (1/1) ... [2024-11-28 04:52:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:52:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:02,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:52:02,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:52:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-28 04:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-28 04:52:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 04:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 04:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 04:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-28 04:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-28 04:52:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-28 04:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:52:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:52:02,938 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 04:52:03,179 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:52:03,182 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:52:04,511 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:52:04,512 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:52:06,841 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:52:06,842 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-28 04:52:06,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:52:06 BoogieIcfgContainer [2024-11-28 04:52:06,842 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:52:06,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:52:06,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:52:06,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:52:06,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:52:01" (1/3) ... [2024-11-28 04:52:06,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca1401c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:52:06, skipping insertion in model container [2024-11-28 04:52:06,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:02" (2/3) ... [2024-11-28 04:52:06,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca1401c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:52:06, skipping insertion in model container [2024-11-28 04:52:06,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:52:06" (3/3) ... [2024-11-28 04:52:06,861 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2024-11-28 04:52:06,883 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:52:06,888 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_93-evilcollapse_racefree.i that has 2 procedures, 111 locations, 1 initial locations, 11 loop locations, and 44 error locations. [2024-11-28 04:52:06,888 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:52:07,059 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-28 04:52:07,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 267 flow [2024-11-28 04:52:07,186 INFO L124 PetriNetUnfolderBase]: 19/142 cut-off events. [2024-11-28 04:52:07,189 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:52:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 19/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 524 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2024-11-28 04:52:07,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 267 flow [2024-11-28 04:52:07,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 130 transitions, 267 flow [2024-11-28 04:52:07,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:52:07,225 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;@5d460dfe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:52:07,225 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-28 04:52:07,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:52:07,243 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-28 04:52:07,243 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:52:07,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:07,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:52:07,245 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:07,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 827692, now seen corresponding path program 1 times [2024-11-28 04:52:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427368806] [2024-11-28 04:52:07,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:07,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:07,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:52:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:07,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:52:07,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:07,802 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 04:52:07,802 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:07,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427368806] [2024-11-28 04:52:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427368806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:07,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:07,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:07,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583059033] [2024-11-28 04:52:07,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:07,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:07,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:07,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:07,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:08,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 130 [2024-11-28 04:52:08,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 130 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 04:52:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:08,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 130 [2024-11-28 04:52:08,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:08,865 INFO L124 PetriNetUnfolderBase]: 126/487 cut-off events. [2024-11-28 04:52:08,865 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-28 04:52:08,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 487 events. 126/487 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2694 event pairs, 64 based on Foata normal form. 52/430 useless extension candidates. Maximal degree in co-relation 675. Up to 179 conditions per place. [2024-11-28 04:52:08,872 INFO L140 encePairwiseOnDemand]: 109/130 looper letters, 68 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2024-11-28 04:52:08,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 423 flow [2024-11-28 04:52:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2024-11-28 04:52:08,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6865384615384615 [2024-11-28 04:52:08,890 INFO L175 Difference]: Start difference. First operand has 114 places, 130 transitions, 267 flow. Second operand 4 states and 357 transitions. [2024-11-28 04:52:08,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 423 flow [2024-11-28 04:52:08,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 136 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:52:08,901 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 247 flow [2024-11-28 04:52:08,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2024-11-28 04:52:08,908 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2024-11-28 04:52:08,908 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 247 flow [2024-11-28 04:52:08,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 04:52:08,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:08,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:52:08,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:09,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:09,113 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:09,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash 827693, now seen corresponding path program 1 times [2024-11-28 04:52:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:09,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747680589] [2024-11-28 04:52:09,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:09,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:09,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:09,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:52:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:09,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:52:09,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:09,615 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 04:52:09,615 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:09,615 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747680589] [2024-11-28 04:52:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747680589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:09,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:09,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231884294] [2024-11-28 04:52:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:09,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:09,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:09,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:09,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:10,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 130 [2024-11-28 04:52:10,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 113 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 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 04:52:10,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:10,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 130 [2024-11-28 04:52:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:10,613 INFO L124 PetriNetUnfolderBase]: 128/518 cut-off events. [2024-11-28 04:52:10,614 INFO L125 PetriNetUnfolderBase]: For 24/25 co-relation queries the response was YES. [2024-11-28 04:52:10,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 518 events. 128/518 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2788 event pairs, 105 based on Foata normal form. 3/409 useless extension candidates. Maximal degree in co-relation 743. Up to 276 conditions per place. [2024-11-28 04:52:10,624 INFO L140 encePairwiseOnDemand]: 122/130 looper letters, 49 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2024-11-28 04:52:10,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 369 flow [2024-11-28 04:52:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-28 04:52:10,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-28 04:52:10,632 INFO L175 Difference]: Start difference. First operand has 113 places, 113 transitions, 247 flow. Second operand 4 states and 325 transitions. [2024-11-28 04:52:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 369 flow [2024-11-28 04:52:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 117 transitions, 357 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:52:10,638 INFO L231 Difference]: Finished difference. Result has 115 places, 117 transitions, 280 flow [2024-11-28 04:52:10,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=115, PETRI_TRANSITIONS=117} [2024-11-28 04:52:10,640 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-28 04:52:10,642 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 117 transitions, 280 flow [2024-11-28 04:52:10,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 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 04:52:10,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:10,642 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 04:52:10,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:10,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:10,847 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:10,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1111232615, now seen corresponding path program 1 times [2024-11-28 04:52:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269919932] [2024-11-28 04:52:10,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:10,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:10,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:10,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:52:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:11,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:52:11,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:11,232 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 04:52:11,242 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 04:52:11,242 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:11,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:11,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269919932] [2024-11-28 04:52:11,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269919932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:11,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:11,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:11,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743717960] [2024-11-28 04:52:11,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:11,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:52:11,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:11,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:52:11,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:52:11,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 130 [2024-11-28 04:52:11,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 04:52:11,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:11,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 130 [2024-11-28 04:52:11,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:11,805 INFO L124 PetriNetUnfolderBase]: 128/517 cut-off events. [2024-11-28 04:52:11,805 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2024-11-28 04:52:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 517 events. 128/517 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2764 event pairs, 105 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 810. Up to 272 conditions per place. [2024-11-28 04:52:11,810 INFO L140 encePairwiseOnDemand]: 127/130 looper letters, 47 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2024-11-28 04:52:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 378 flow [2024-11-28 04:52:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:52:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:52:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-11-28 04:52:11,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.658974358974359 [2024-11-28 04:52:11,840 INFO L175 Difference]: Start difference. First operand has 115 places, 117 transitions, 280 flow. Second operand 3 states and 257 transitions. [2024-11-28 04:52:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 378 flow [2024-11-28 04:52:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:11,848 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 281 flow [2024-11-28 04:52:11,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-11-28 04:52:11,849 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-28 04:52:11,849 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 281 flow [2024-11-28 04:52:11,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 04:52:11,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:11,850 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 04:52:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:12,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:12,050 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:12,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1111232614, now seen corresponding path program 1 times [2024-11-28 04:52:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:12,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992381513] [2024-11-28 04:52:12,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:12,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:12,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:12,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:12,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:52:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:12,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:52:12,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:12,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:52:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:12,442 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:12,442 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992381513] [2024-11-28 04:52:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992381513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:12,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362398694] [2024-11-28 04:52:12,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:12,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:52:12,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:12,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:52:12,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:52:12,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 130 [2024-11-28 04:52:12,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 04:52:12,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:12,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 130 [2024-11-28 04:52:12,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:13,083 INFO L124 PetriNetUnfolderBase]: 128/516 cut-off events. [2024-11-28 04:52:13,084 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-11-28 04:52:13,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 516 events. 128/516 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2759 event pairs, 105 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 809. Up to 272 conditions per place. [2024-11-28 04:52:13,088 INFO L140 encePairwiseOnDemand]: 127/130 looper letters, 47 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2024-11-28 04:52:13,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 115 transitions, 379 flow [2024-11-28 04:52:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:52:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:52:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-11-28 04:52:13,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.658974358974359 [2024-11-28 04:52:13,090 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 281 flow. Second operand 3 states and 257 transitions. [2024-11-28 04:52:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 115 transitions, 379 flow [2024-11-28 04:52:13,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 115 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:52:13,094 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 279 flow [2024-11-28 04:52:13,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2024-11-28 04:52:13,095 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 0 predicate places. [2024-11-28 04:52:13,095 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 279 flow [2024-11-28 04:52:13,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 04:52:13,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:13,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:13,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:13,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:13,301 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:13,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash -88471835, now seen corresponding path program 1 times [2024-11-28 04:52:13,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:13,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182143579] [2024-11-28 04:52:13,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:13,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:13,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:13,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:52:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:13,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:52:13,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:13,694 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 04:52:13,729 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 04:52:13,729 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:13,729 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:13,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182143579] [2024-11-28 04:52:13,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182143579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:13,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:13,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:13,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519934698] [2024-11-28 04:52:13,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:13,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:13,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:13,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:14,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 130 [2024-11-28 04:52:14,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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 04:52:14,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:14,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 130 [2024-11-28 04:52:14,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:14,571 INFO L124 PetriNetUnfolderBase]: 128/514 cut-off events. [2024-11-28 04:52:14,571 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2024-11-28 04:52:14,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 514 events. 128/514 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2750 event pairs, 105 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 807. Up to 274 conditions per place. [2024-11-28 04:52:14,574 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 48 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2024-11-28 04:52:14,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 113 transitions, 379 flow [2024-11-28 04:52:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2024-11-28 04:52:14,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6038461538461538 [2024-11-28 04:52:14,576 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 279 flow. Second operand 4 states and 314 transitions. [2024-11-28 04:52:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 113 transitions, 379 flow [2024-11-28 04:52:14,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 113 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:52:14,580 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 277 flow [2024-11-28 04:52:14,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2024-11-28 04:52:14,581 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2024-11-28 04:52:14,581 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 277 flow [2024-11-28 04:52:14,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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 04:52:14,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:14,582 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:14,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:52:14,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:14,783 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:14,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash -88471836, now seen corresponding path program 1 times [2024-11-28 04:52:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:14,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112051499] [2024-11-28 04:52:14,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:14,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:52:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:15,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:52:15,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:15,072 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 04:52:15,089 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 04:52:15,089 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:15,089 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112051499] [2024-11-28 04:52:15,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112051499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:15,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:15,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913871508] [2024-11-28 04:52:15,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:15,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:15,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:15,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:15,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 130 [2024-11-28 04:52:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 113 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 04:52:15,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:15,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 130 [2024-11-28 04:52:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:15,786 INFO L124 PetriNetUnfolderBase]: 128/512 cut-off events. [2024-11-28 04:52:15,787 INFO L125 PetriNetUnfolderBase]: For 9/10 co-relation queries the response was YES. [2024-11-28 04:52:15,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 512 events. 128/512 cut-off events. For 9/10 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2738 event pairs, 105 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 808. Up to 272 conditions per place. [2024-11-28 04:52:15,790 INFO L140 encePairwiseOnDemand]: 123/130 looper letters, 45 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2024-11-28 04:52:15,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 377 flow [2024-11-28 04:52:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:52:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:52:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2024-11-28 04:52:15,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-11-28 04:52:15,793 INFO L175 Difference]: Start difference. First operand has 113 places, 113 transitions, 277 flow. Second operand 5 states and 370 transitions. [2024-11-28 04:52:15,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 377 flow [2024-11-28 04:52:15,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 111 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:52:15,796 INFO L231 Difference]: Finished difference. Result has 112 places, 111 transitions, 279 flow [2024-11-28 04:52:15,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=112, PETRI_TRANSITIONS=111} [2024-11-28 04:52:15,798 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -2 predicate places. [2024-11-28 04:52:15,798 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 111 transitions, 279 flow [2024-11-28 04:52:15,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 04:52:15,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:15,798 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-28 04:52:15,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:15,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:15,999 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:15,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:16,000 INFO L85 PathProgramCache]: Analyzing trace with hash -88469914, now seen corresponding path program 1 times [2024-11-28 04:52:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:16,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671747588] [2024-11-28 04:52:16,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:16,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:16,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:52:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:16,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 04:52:16,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:16,359 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 04:52:16,359 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:16,359 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671747588] [2024-11-28 04:52:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671747588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:16,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:16,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311250801] [2024-11-28 04:52:16,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:16,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:52:16,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:16,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:52:16,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:52:16,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 130 [2024-11-28 04:52:16,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 111 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 04:52:16,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:16,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 130 [2024-11-28 04:52:16,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:16,746 INFO L124 PetriNetUnfolderBase]: 127/530 cut-off events. [2024-11-28 04:52:16,747 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2024-11-28 04:52:16,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 530 events. 127/530 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2784 event pairs, 105 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 835. Up to 272 conditions per place. [2024-11-28 04:52:16,750 INFO L140 encePairwiseOnDemand]: 127/130 looper letters, 51 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2024-11-28 04:52:16,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 115 transitions, 401 flow [2024-11-28 04:52:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:52:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:52:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-11-28 04:52:16,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2024-11-28 04:52:16,757 INFO L175 Difference]: Start difference. First operand has 112 places, 111 transitions, 279 flow. Second operand 3 states and 265 transitions. [2024-11-28 04:52:16,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 115 transitions, 401 flow [2024-11-28 04:52:16,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 381 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:52:16,763 INFO L231 Difference]: Finished difference. Result has 111 places, 111 transitions, 276 flow [2024-11-28 04:52:16,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=111, PETRI_TRANSITIONS=111} [2024-11-28 04:52:16,765 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-28 04:52:16,765 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 111 transitions, 276 flow [2024-11-28 04:52:16,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 04:52:16,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:16,766 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:16,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:52:16,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:16,971 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:16,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash 877938867, now seen corresponding path program 1 times [2024-11-28 04:52:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:16,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623763930] [2024-11-28 04:52:16,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:16,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:16,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:16,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:52:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:17,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:52:17,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:17,375 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:52:17,375 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 04:52:17,426 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 04:52:17,427 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:17,427 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:17,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623763930] [2024-11-28 04:52:17,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623763930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:17,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:17,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030473482] [2024-11-28 04:52:17,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:17,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:17,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:17,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:17,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 130 [2024-11-28 04:52:17,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 111 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 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 04:52:17,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:17,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 130 [2024-11-28 04:52:17,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:18,081 INFO L124 PetriNetUnfolderBase]: 126/500 cut-off events. [2024-11-28 04:52:18,081 INFO L125 PetriNetUnfolderBase]: For 32/33 co-relation queries the response was YES. [2024-11-28 04:52:18,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 500 events. 126/500 cut-off events. For 32/33 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2633 event pairs, 64 based on Foata normal form. 2/396 useless extension candidates. Maximal degree in co-relation 806. Up to 182 conditions per place. [2024-11-28 04:52:18,084 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 69 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2024-11-28 04:52:18,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 466 flow [2024-11-28 04:52:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 336 transitions. [2024-11-28 04:52:18,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-11-28 04:52:18,087 INFO L175 Difference]: Start difference. First operand has 111 places, 111 transitions, 276 flow. Second operand 4 states and 336 transitions. [2024-11-28 04:52:18,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 466 flow [2024-11-28 04:52:18,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 132 transitions, 463 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:18,090 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 279 flow [2024-11-28 04:52:18,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-11-28 04:52:18,091 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-28 04:52:18,091 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 279 flow [2024-11-28 04:52:18,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 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 04:52:18,092 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:18,092 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:18,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:52:18,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:18,293 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:18,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 877938868, now seen corresponding path program 1 times [2024-11-28 04:52:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311293774] [2024-11-28 04:52:18,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:18,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:18,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:52:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:18,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:52:18,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:52:18,788 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 04:52:18,873 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 04:52:18,873 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:18,873 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311293774] [2024-11-28 04:52:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311293774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:18,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:18,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709177559] [2024-11-28 04:52:18,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:18,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:52:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:18,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:52:18,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:52:19,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 130 [2024-11-28 04:52:19,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 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 04:52:19,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:19,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 130 [2024-11-28 04:52:19,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:19,825 INFO L124 PetriNetUnfolderBase]: 129/558 cut-off events. [2024-11-28 04:52:19,825 INFO L125 PetriNetUnfolderBase]: For 51/52 co-relation queries the response was YES. [2024-11-28 04:52:19,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 558 events. 129/558 cut-off events. For 51/52 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3054 event pairs, 106 based on Foata normal form. 2/434 useless extension candidates. Maximal degree in co-relation 856. Up to 283 conditions per place. [2024-11-28 04:52:19,828 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 55 selfloop transitions, 5 changer transitions 0/116 dead transitions. [2024-11-28 04:52:19,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 429 flow [2024-11-28 04:52:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 323 transitions. [2024-11-28 04:52:19,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6211538461538462 [2024-11-28 04:52:19,831 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 279 flow. Second operand 4 states and 323 transitions. [2024-11-28 04:52:19,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 429 flow [2024-11-28 04:52:19,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 116 transitions, 413 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:52:19,834 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 315 flow [2024-11-28 04:52:19,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2024-11-28 04:52:19,835 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2024-11-28 04:52:19,835 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 315 flow [2024-11-28 04:52:19,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 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 04:52:19,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:19,836 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:19,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:20,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:20,037 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:20,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1446302029, now seen corresponding path program 1 times [2024-11-28 04:52:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116339441] [2024-11-28 04:52:20,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:20,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:20,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:20,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:20,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:52:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:20,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:52:20,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:20,472 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 04:52:20,555 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 04:52:20,631 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:52:20,632 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 04:52:20,695 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 04:52:20,753 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 04:52:20,787 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 04:52:20,848 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 04:52:20,848 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:20,848 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116339441] [2024-11-28 04:52:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116339441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:52:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582033837] [2024-11-28 04:52:20,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:20,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:52:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:20,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:52:20,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:52:22,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 130 [2024-11-28 04:52:22,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 113 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 04:52:22,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:22,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 130 [2024-11-28 04:52:22,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:24,235 INFO L124 PetriNetUnfolderBase]: 129/557 cut-off events. [2024-11-28 04:52:24,235 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2024-11-28 04:52:24,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 557 events. 129/557 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3017 event pairs, 106 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 863. Up to 292 conditions per place. [2024-11-28 04:52:24,238 INFO L140 encePairwiseOnDemand]: 118/130 looper letters, 68 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2024-11-28 04:52:24,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 129 transitions, 511 flow [2024-11-28 04:52:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:52:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 04:52:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 662 transitions. [2024-11-28 04:52:24,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46293706293706294 [2024-11-28 04:52:24,242 INFO L175 Difference]: Start difference. First operand has 113 places, 113 transitions, 315 flow. Second operand 11 states and 662 transitions. [2024-11-28 04:52:24,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 129 transitions, 511 flow [2024-11-28 04:52:24,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 129 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:24,244 INFO L231 Difference]: Finished difference. Result has 127 places, 118 transitions, 371 flow [2024-11-28 04:52:24,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=371, PETRI_PLACES=127, PETRI_TRANSITIONS=118} [2024-11-28 04:52:24,245 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 13 predicate places. [2024-11-28 04:52:24,245 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 118 transitions, 371 flow [2024-11-28 04:52:24,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 04:52:24,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:24,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:24,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:52:24,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:24,447 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:24,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1446302030, now seen corresponding path program 1 times [2024-11-28 04:52:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:24,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592201565] [2024-11-28 04:52:24,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:24,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:24,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:52:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:24,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 04:52:24,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:24,892 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 04:52:24,903 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 04:52:24,984 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 04:52:24,996 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 04:52:25,080 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:52:25,080 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 04:52:25,093 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 04:52:25,161 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 04:52:25,178 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 04:52:25,232 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 04:52:25,253 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 04:52:25,292 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 04:52:25,301 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 04:52:25,395 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 04:52:25,395 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:25,395 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592201565] [2024-11-28 04:52:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592201565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:25,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:52:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048932697] [2024-11-28 04:52:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:25,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:52:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:25,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:52:25,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:52:27,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2024-11-28 04:52:27,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 118 transitions, 371 flow. Second operand has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 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 04:52:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2024-11-28 04:52:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:29,153 INFO L124 PetriNetUnfolderBase]: 129/556 cut-off events. [2024-11-28 04:52:29,153 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2024-11-28 04:52:29,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 556 events. 129/556 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3013 event pairs, 106 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 912. Up to 296 conditions per place. [2024-11-28 04:52:29,158 INFO L140 encePairwiseOnDemand]: 119/130 looper letters, 71 selfloop transitions, 10 changer transitions 0/129 dead transitions. [2024-11-28 04:52:29,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 129 transitions, 563 flow [2024-11-28 04:52:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:52:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 04:52:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 591 transitions. [2024-11-28 04:52:29,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4546153846153846 [2024-11-28 04:52:29,163 INFO L175 Difference]: Start difference. First operand has 127 places, 118 transitions, 371 flow. Second operand 10 states and 591 transitions. [2024-11-28 04:52:29,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 129 transitions, 563 flow [2024-11-28 04:52:29,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:52:29,168 INFO L231 Difference]: Finished difference. Result has 135 places, 118 transitions, 391 flow [2024-11-28 04:52:29,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2024-11-28 04:52:29,170 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 21 predicate places. [2024-11-28 04:52:29,171 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 391 flow [2024-11-28 04:52:29,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 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 04:52:29,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:29,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:29,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:29,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:29,372 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:29,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:29,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1885690755, now seen corresponding path program 1 times [2024-11-28 04:52:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:29,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361927533] [2024-11-28 04:52:29,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:29,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:29,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:29,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:29,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:52:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:29,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:52:29,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:29,702 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 04:52:29,702 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:29,703 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361927533] [2024-11-28 04:52:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361927533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:29,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:29,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804910254] [2024-11-28 04:52:29,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:29,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:29,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:29,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:29,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:29,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 130 [2024-11-28 04:52:29,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 04:52:29,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:29,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 130 [2024-11-28 04:52:29,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:30,170 INFO L124 PetriNetUnfolderBase]: 128/546 cut-off events. [2024-11-28 04:52:30,171 INFO L125 PetriNetUnfolderBase]: For 57/58 co-relation queries the response was YES. [2024-11-28 04:52:30,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 546 events. 128/546 cut-off events. For 57/58 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2955 event pairs, 105 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 890. Up to 273 conditions per place. [2024-11-28 04:52:30,174 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 50 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2024-11-28 04:52:30,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 116 transitions, 505 flow [2024-11-28 04:52:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2024-11-28 04:52:30,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6038461538461538 [2024-11-28 04:52:30,176 INFO L175 Difference]: Start difference. First operand has 135 places, 118 transitions, 391 flow. Second operand 4 states and 314 transitions. [2024-11-28 04:52:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 116 transitions, 505 flow [2024-11-28 04:52:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 116 transitions, 485 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-28 04:52:30,180 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 385 flow [2024-11-28 04:52:30,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=385, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2024-11-28 04:52:30,181 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 13 predicate places. [2024-11-28 04:52:30,181 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 385 flow [2024-11-28 04:52:30,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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 04:52:30,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:30,181 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:30,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:52:30,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:30,382 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:30,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1885690756, now seen corresponding path program 1 times [2024-11-28 04:52:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:30,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979584945] [2024-11-28 04:52:30,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:30,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:30,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:30,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:30,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:52:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:30,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:52:30,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:30,733 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 04:52:30,788 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 04:52:30,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:30,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979584945] [2024-11-28 04:52:30,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979584945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:30,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:30,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:30,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14863024] [2024-11-28 04:52:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:30,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:30,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:30,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:31,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 130 [2024-11-28 04:52:31,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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 04:52:31,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:31,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 130 [2024-11-28 04:52:31,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:31,461 INFO L124 PetriNetUnfolderBase]: 128/538 cut-off events. [2024-11-28 04:52:31,461 INFO L125 PetriNetUnfolderBase]: For 89/90 co-relation queries the response was YES. [2024-11-28 04:52:31,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 538 events. 128/538 cut-off events. For 89/90 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2904 event pairs, 105 based on Foata normal form. 8/443 useless extension candidates. Maximal degree in co-relation 883. Up to 273 conditions per place. [2024-11-28 04:52:31,463 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 48 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2024-11-28 04:52:31,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 114 transitions, 495 flow [2024-11-28 04:52:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2024-11-28 04:52:31,465 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-28 04:52:31,465 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 385 flow. Second operand 4 states and 320 transitions. [2024-11-28 04:52:31,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 114 transitions, 495 flow [2024-11-28 04:52:31,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 114 transitions, 477 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:52:31,468 INFO L231 Difference]: Finished difference. Result has 125 places, 114 transitions, 381 flow [2024-11-28 04:52:31,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=381, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2024-11-28 04:52:31,470 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 11 predicate places. [2024-11-28 04:52:31,470 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 381 flow [2024-11-28 04:52:31,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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 04:52:31,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:31,471 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:31,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:52:31,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:31,672 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:31,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1598460062, now seen corresponding path program 1 times [2024-11-28 04:52:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:31,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616773766] [2024-11-28 04:52:31,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:31,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:31,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:31,674 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:31,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:52:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:32,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:52:32,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:32,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:32,129 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616773766] [2024-11-28 04:52:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616773766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:32,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-28 04:52:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331767595] [2024-11-28 04:52:32,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:32,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:52:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:32,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:52:32,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:52:32,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 130 [2024-11-28 04:52:32,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 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 04:52:32,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:32,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 130 [2024-11-28 04:52:32,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:32,881 INFO L124 PetriNetUnfolderBase]: 128/588 cut-off events. [2024-11-28 04:52:32,882 INFO L125 PetriNetUnfolderBase]: For 153/154 co-relation queries the response was YES. [2024-11-28 04:52:32,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 588 events. 128/588 cut-off events. For 153/154 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3032 event pairs, 105 based on Foata normal form. 6/487 useless extension candidates. Maximal degree in co-relation 1009. Up to 269 conditions per place. [2024-11-28 04:52:32,886 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 65 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2024-11-28 04:52:32,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 133 transitions, 655 flow [2024-11-28 04:52:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:52:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:52:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2024-11-28 04:52:32,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6294871794871795 [2024-11-28 04:52:32,890 INFO L175 Difference]: Start difference. First operand has 125 places, 114 transitions, 381 flow. Second operand 6 states and 491 transitions. [2024-11-28 04:52:32,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 133 transitions, 655 flow [2024-11-28 04:52:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 133 transitions, 611 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:52:32,896 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 449 flow [2024-11-28 04:52:32,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2024-11-28 04:52:32,897 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2024-11-28 04:52:32,898 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 449 flow [2024-11-28 04:52:32,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 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 04:52:32,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:32,899 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:32,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:33,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:33,099 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:33,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1364886549, now seen corresponding path program 1 times [2024-11-28 04:52:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794025798] [2024-11-28 04:52:33,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:33,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:52:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:33,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:52:33,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:33,504 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 04:52:33,680 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 04:52:33,782 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-28 04:52:33,782 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 04:52:33,868 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 04:52:33,945 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 04:52:33,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-28 04:52:34,025 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 04:52:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:34,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:34,193 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |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 04:52:34,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:34,511 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 04:52:34,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:34,539 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 04:52:34,551 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 04:52:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 04:52:45,080 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794025798] [2024-11-28 04:52:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794025798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:45,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 04:52:45,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297671142] [2024-11-28 04:52:45,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:45,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:52:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:45,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:52:45,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=214, Unknown=14, NotChecked=30, Total=306 [2024-11-28 04:52:45,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 130 [2024-11-28 04:52:45,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 119 transitions, 449 flow. Second operand has 18 states, 18 states have (on average 29.88888888888889) internal successors, (538), 18 states have internal predecessors, (538), 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 04:52:45,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:45,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 130 [2024-11-28 04:52:45,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:48,159 INFO L124 PetriNetUnfolderBase]: 330/1034 cut-off events. [2024-11-28 04:52:48,159 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-28 04:52:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2011 conditions, 1034 events. 330/1034 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6131 event pairs, 292 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1913. Up to 678 conditions per place. [2024-11-28 04:52:48,164 INFO L140 encePairwiseOnDemand]: 122/130 looper letters, 78 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-11-28 04:52:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 130 transitions, 693 flow [2024-11-28 04:52:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:52:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 04:52:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 394 transitions. [2024-11-28 04:52:48,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2755244755244755 [2024-11-28 04:52:48,167 INFO L175 Difference]: Start difference. First operand has 131 places, 119 transitions, 449 flow. Second operand 11 states and 394 transitions. [2024-11-28 04:52:48,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 130 transitions, 693 flow [2024-11-28 04:52:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 130 transitions, 677 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:48,173 INFO L231 Difference]: Finished difference. Result has 143 places, 124 transitions, 523 flow [2024-11-28 04:52:48,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=523, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2024-11-28 04:52:48,174 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 29 predicate places. [2024-11-28 04:52:48,174 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 523 flow [2024-11-28 04:52:48,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.88888888888889) internal successors, (538), 18 states have internal predecessors, (538), 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 04:52:48,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:48,175 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:48,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:48,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:48,375 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:52:48,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1364886550, now seen corresponding path program 1 times [2024-11-28 04:52:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:48,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893830455] [2024-11-28 04:52:48,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:48,379 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:52:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:48,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:52:48,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:48,822 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 04:52:49,197 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 04:52:49,205 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 04:52:49,308 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-28 04:52:49,308 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 04:52:49,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 17 [2024-11-28 04:52:49,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-28 04:52:49,396 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 04:52:49,483 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 04:52:49,498 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 04:52:49,539 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 04:52:49,550 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 04:52:49,619 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 04:52:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:49,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:49,918 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$#1.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.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 04:52:49,979 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$#1.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-28 04:52:50,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:50,275 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 04:52:50,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:50,290 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 04:52:50,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:50,325 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 74 treesize of output 77 [2024-11-28 04:52:50,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:50,371 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 04:52:50,386 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 04:52:50,395 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 04:52:51,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:51,175 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 04:52:51,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:51,203 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 04:52:51,214 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 04:52:57,352 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2024-11-28 04:52:57,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 156 [2024-11-28 04:52:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-28 04:52:57,772 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893830455] [2024-11-28 04:52:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893830455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:57,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:57,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2024-11-28 04:52:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333310836] [2024-11-28 04:52:57,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:57,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:52:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:57,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:52:57,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=293, Unknown=3, NotChecked=70, Total=420 [2024-11-28 04:52:58,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 130 [2024-11-28 04:52:58,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 523 flow. Second operand has 21 states, 21 states have (on average 21.61904761904762) internal successors, (454), 21 states have internal predecessors, (454), 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 04:52:58,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:58,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 130 [2024-11-28 04:52:58,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:06,422 INFO L124 PetriNetUnfolderBase]: 466/1256 cut-off events. [2024-11-28 04:53:06,423 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-11-28 04:53:06,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2563 conditions, 1256 events. 466/1256 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7496 event pairs, 422 based on Foata normal form. 6/838 useless extension candidates. Maximal degree in co-relation 2474. Up to 952 conditions per place. [2024-11-28 04:53:06,429 INFO L140 encePairwiseOnDemand]: 120/130 looper letters, 83 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-11-28 04:53:06,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 129 transitions, 755 flow [2024-11-28 04:53:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:53:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 04:53:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 353 transitions. [2024-11-28 04:53:06,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20887573964497042 [2024-11-28 04:53:06,433 INFO L175 Difference]: Start difference. First operand has 143 places, 124 transitions, 523 flow. Second operand 13 states and 353 transitions. [2024-11-28 04:53:06,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 129 transitions, 755 flow [2024-11-28 04:53:06,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 129 transitions, 725 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-28 04:53:06,438 INFO L231 Difference]: Finished difference. Result has 154 places, 126 transitions, 559 flow [2024-11-28 04:53:06,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=559, PETRI_PLACES=154, PETRI_TRANSITIONS=126} [2024-11-28 04:53:06,440 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2024-11-28 04:53:06,440 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 126 transitions, 559 flow [2024-11-28 04:53:06,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.61904761904762) internal successors, (454), 21 states have internal predecessors, (454), 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 04:53:06,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:06,441 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-28 04:53:06,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:06,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:06,641 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:53:06,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1738427494, now seen corresponding path program 2 times [2024-11-28 04:53:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:06,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666221882] [2024-11-28 04:53:06,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:06,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:06,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:06,644 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:06,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:53:07,154 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:07,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:07,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:53:07,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:53:07,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:53:07,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666221882] [2024-11-28 04:53:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666221882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:07,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-28 04:53:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087459971] [2024-11-28 04:53:07,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:07,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:53:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:07,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:53:07,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:53:07,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 130 [2024-11-28 04:53:07,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 126 transitions, 559 flow. Second operand has 12 states, 12 states have (on average 74.91666666666667) internal successors, (899), 12 states have internal predecessors, (899), 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 04:53:07,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:07,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 130 [2024-11-28 04:53:07,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:09,113 INFO L124 PetriNetUnfolderBase]: 128/696 cut-off events. [2024-11-28 04:53:09,113 INFO L125 PetriNetUnfolderBase]: For 541/542 co-relation queries the response was YES. [2024-11-28 04:53:09,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 696 events. 128/696 cut-off events. For 541/542 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3006 event pairs, 105 based on Foata normal form. 12/608 useless extension candidates. Maximal degree in co-relation 1569. Up to 269 conditions per place. [2024-11-28 04:53:09,118 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 95 selfloop transitions, 23 changer transitions 0/178 dead transitions. [2024-11-28 04:53:09,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 178 transitions, 1311 flow [2024-11-28 04:53:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:53:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 04:53:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 950 transitions. [2024-11-28 04:53:09,122 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-11-28 04:53:09,122 INFO L175 Difference]: Start difference. First operand has 154 places, 126 transitions, 559 flow. Second operand 12 states and 950 transitions. [2024-11-28 04:53:09,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 178 transitions, 1311 flow [2024-11-28 04:53:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 178 transitions, 1159 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-28 04:53:09,130 INFO L231 Difference]: Finished difference. Result has 162 places, 139 transitions, 766 flow [2024-11-28 04:53:09,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=766, PETRI_PLACES=162, PETRI_TRANSITIONS=139} [2024-11-28 04:53:09,131 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 48 predicate places. [2024-11-28 04:53:09,132 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 139 transitions, 766 flow [2024-11-28 04:53:09,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.91666666666667) internal successors, (899), 12 states have internal predecessors, (899), 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 04:53:09,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:09,132 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-28 04:53:09,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:53:09,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:09,333 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-28 04:53:09,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1713927834, now seen corresponding path program 3 times [2024-11-28 04:53:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459418979] [2024-11-28 04:53:09,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:09,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:09,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:09,338 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:09,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db712611-301f-4979-be6b-4dc594593fd8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process