./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:41:18,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:41:18,466 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 10:41:18,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:41:18,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:41:18,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:41:18,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:41:18,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:41:18,490 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:41:18,490 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:41:18,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:41:18,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:41:18,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:41:18,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:41:18,491 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:41:18,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:41:18,491 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:41:18,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:41:18,492 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:41:18,493 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:41:18,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:41:18,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:41:18,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:41:18,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:41:18,494 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_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-12-02 10:41:18,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:41:18,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:41:18,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:41:18,707 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:41:18,707 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:41:18,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-12-02 10:41:21,317 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/4de24d2f3/d52623bba3264609b50f3409221ef4c2/FLAGd20bbff67 [2024-12-02 10:41:21,547 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:41:21,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-12-02 10:41:21,558 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/4de24d2f3/d52623bba3264609b50f3409221ef4c2/FLAGd20bbff67 [2024-12-02 10:41:21,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/4de24d2f3/d52623bba3264609b50f3409221ef4c2 [2024-12-02 10:41:21,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:41:21,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:41:21,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:41:21,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:41:21,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:41:21,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:41:21" (1/1) ... [2024-12-02 10:41:21,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc032c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:21, skipping insertion in model container [2024-12-02 10:41:21,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:41:21" (1/1) ... [2024-12-02 10:41:21,899 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:41:22,188 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:22,188 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:22,188 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:22,189 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:22,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:41:22,239 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) [2024-12-02 10:41:22,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21475d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:22, skipping insertion in model container [2024-12-02 10:41:22,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:41:22,240 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-12-02 10:41:22,241 INFO L158 Benchmark]: Toolchain (without parser) took 375.99ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.4MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 10:41:22,241 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:41:22,241 INFO L158 Benchmark]: CACSL2BoogieTranslator took 374.48ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.4MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 10:41:22,242 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 374.48ms. Allocated memory is still 117.4MB. Free memory was 90.5MB in the beginning and 74.4MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1031]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:41:23,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:41:24,012 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-12-02 10:41:24,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:41:24,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:41:24,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:41:24,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:41:24,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:41:24,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:41:24,043 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:41:24,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:41:24,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:41:24,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:41:24,043 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:41:24,044 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 10:41:24,044 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:41:24,045 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:41:24,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:41:24,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:41:24,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:41:24,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:41:24,046 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_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2024-12-02 10:41:24,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:41:24,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:41:24,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:41:24,289 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:41:24,289 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:41:24,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-12-02 10:41:27,012 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/2a2f7b497/247352b5aca94d61a1753db54dd78faf/FLAGdbbab51ac [2024-12-02 10:41:27,244 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:41:27,245 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2024-12-02 10:41:27,259 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/2a2f7b497/247352b5aca94d61a1753db54dd78faf/FLAGdbbab51ac [2024-12-02 10:41:27,273 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/data/2a2f7b497/247352b5aca94d61a1753db54dd78faf [2024-12-02 10:41:27,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:41:27,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:41:27,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:41:27,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:41:27,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:41:27,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2825899e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27, skipping insertion in model container [2024-12-02 10:41:27,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,313 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:41:27,630 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,630 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,631 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,631 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:41:27,682 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-12-02 10:41:27,689 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:41:27,723 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,723 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,723 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,723 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:41:27,749 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:41:27,781 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,781 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,781 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,782 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 10:41:27,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:41:27,856 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:41:27,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27 WrapperNode [2024-12-02 10:41:27,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:41:27,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:41:27,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:41:27,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:41:27,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,904 INFO L138 Inliner]: procedures = 274, calls = 95, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 177 [2024-12-02 10:41:27,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:41:27,904 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:41:27,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:41:27,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:41:27,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,918 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,938 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2024-12-02 10:41:27,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,952 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:41:27,964 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:41:27,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:41:27,964 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:41:27,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (1/1) ... [2024-12-02 10:41:27,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:41:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:27,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:41:27,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:41:28,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 10:41:28,018 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-12-02 10:41:28,019 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 10:41:28,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:41:28,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:41:28,021 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 10:41:28,144 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:41:28,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:41:28,752 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 10:41:28,752 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:41:29,933 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:41:29,933 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 10:41:29,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:41:29 BoogieIcfgContainer [2024-12-02 10:41:29,933 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:41:29,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:41:29,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:41:29,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:41:29,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:41:27" (1/3) ... [2024-12-02 10:41:29,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b6ed9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:41:29, skipping insertion in model container [2024-12-02 10:41:29,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:41:27" (2/3) ... [2024-12-02 10:41:29,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b6ed9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:41:29, skipping insertion in model container [2024-12-02 10:41:29,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:41:29" (3/3) ... [2024-12-02 10:41:29,942 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_21-arrayloop2_nr.i [2024-12-02 10:41:29,958 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:41:29,959 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_21-arrayloop2_nr.i that has 2 procedures, 60 locations, 1 initial locations, 4 loop locations, and 29 error locations. [2024-12-02 10:41:29,959 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 10:41:30,043 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-12-02 10:41:30,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2024-12-02 10:41:30,122 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2024-12-02 10:41:30,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 10:41:30,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 332 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-12-02 10:41:30,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2024-12-02 10:41:30,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2024-12-02 10:41:30,138 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:41:30,149 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;@4961a25d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:41:30,149 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-12-02 10:41:30,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 10:41:30,159 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-12-02 10:41:30,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 10:41:30,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:30,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:41:30,161 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:30,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 489959, now seen corresponding path program 1 times [2024-12-02 10:41:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972258310] [2024-12-02 10:41:30,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:30,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:30,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:30,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:41:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:30,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 10:41:30,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:30,505 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:30,506 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972258310] [2024-12-02 10:41:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972258310] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:30,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:41:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93156837] [2024-12-02 10:41:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:30,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:30,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:30,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:30,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 85 [2024-12-02 10:41:30,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:30,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:30,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 85 [2024-12-02 10:41:30,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:31,091 INFO L124 PetriNetUnfolderBase]: 482/954 cut-off events. [2024-12-02 10:41:31,091 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 10:41:31,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 954 events. 482/954 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5128 event pairs, 368 based on Foata normal form. 1/856 useless extension candidates. Maximal degree in co-relation 1678. Up to 752 conditions per place. [2024-12-02 10:41:31,100 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-12-02 10:41:31,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 238 flow [2024-12-02 10:41:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-12-02 10:41:31,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638235294117647 [2024-12-02 10:41:31,113 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 217 transitions. [2024-12-02 10:41:31,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 238 flow [2024-12-02 10:41:31,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:41:31,121 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2024-12-02 10:41:31,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-12-02 10:41:31,125 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-12-02 10:41:31,125 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2024-12-02 10:41:31,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:31,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:31,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:41:31,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:41:31,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:31,326 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:31,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 489960, now seen corresponding path program 1 times [2024-12-02 10:41:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939389252] [2024-12-02 10:41:31,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:31,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:31,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:41:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:31,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 10:41:31,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:31,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:31,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939389252] [2024-12-02 10:41:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939389252] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:41:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421735568] [2024-12-02 10:41:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:31,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:31,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:31,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:31,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-12-02 10:41:31,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:31,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:31,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-12-02 10:41:31,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:32,338 INFO L124 PetriNetUnfolderBase]: 483/959 cut-off events. [2024-12-02 10:41:32,338 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 10:41:32,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 959 events. 483/959 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5061 event pairs, 368 based on Foata normal form. 3/864 useless extension candidates. Maximal degree in co-relation 1718. Up to 757 conditions per place. [2024-12-02 10:41:32,345 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 38 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-12-02 10:41:32,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 266 flow [2024-12-02 10:41:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-12-02 10:41:32,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-12-02 10:41:32,348 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 230 transitions. [2024-12-02 10:41:32,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 266 flow [2024-12-02 10:41:32,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:32,353 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2024-12-02 10:41:32,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-12-02 10:41:32,354 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-12-02 10:41:32,354 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2024-12-02 10:41:32,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:32,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:32,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:41:32,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:41:32,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:32,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:32,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1711914373, now seen corresponding path program 1 times [2024-12-02 10:41:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493429281] [2024-12-02 10:41:32,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:32,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:32,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:41:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:32,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:41:32,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:32,806 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 [2024-12-02 10:41:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:32,817 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:32,817 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:32,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493429281] [2024-12-02 10:41:32,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493429281] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:32,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:32,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:41:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932942201] [2024-12-02 10:41:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:32,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:41:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:32,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:41:32,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:41:32,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-12-02 10:41:32,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:32,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:32,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-12-02 10:41:32,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:33,182 INFO L124 PetriNetUnfolderBase]: 483/958 cut-off events. [2024-12-02 10:41:33,183 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 10:41:33,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 958 events. 483/958 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5046 event pairs, 368 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 1724. Up to 753 conditions per place. [2024-12-02 10:41:33,187 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-12-02 10:41:33,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 277 flow [2024-12-02 10:41:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:41:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:41:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-12-02 10:41:33,189 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-12-02 10:41:33,189 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 183 transitions. [2024-12-02 10:41:33,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 277 flow [2024-12-02 10:41:33,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:41:33,191 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2024-12-02 10:41:33,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-12-02 10:41:33,191 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-12-02 10:41:33,191 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2024-12-02 10:41:33,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:33,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:33,192 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:41:33,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:41:33,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:33,392 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1711914372, now seen corresponding path program 1 times [2024-12-02 10:41:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627925605] [2024-12-02 10:41:33,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:33,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:33,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:33,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:41:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:33,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 10:41:33,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:33,664 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 [2024-12-02 10:41:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:33,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:33,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627925605] [2024-12-02 10:41:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627925605] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:33,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:33,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:41:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099011038] [2024-12-02 10:41:33,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:33,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:41:33,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:33,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:41:33,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:41:33,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2024-12-02 10:41:33,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:33,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:33,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2024-12-02 10:41:33,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:34,030 INFO L124 PetriNetUnfolderBase]: 483/957 cut-off events. [2024-12-02 10:41:34,030 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 10:41:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 957 events. 483/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5080 event pairs, 368 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 1723. Up to 753 conditions per place. [2024-12-02 10:41:34,036 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 36 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-12-02 10:41:34,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 278 flow [2024-12-02 10:41:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:41:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:41:34,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-12-02 10:41:34,038 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2024-12-02 10:41:34,038 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-12-02 10:41:34,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 278 flow [2024-12-02 10:41:34,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:41:34,040 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2024-12-02 10:41:34,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-12-02 10:41:34,041 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-12-02 10:41:34,041 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2024-12-02 10:41:34,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:34,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:34,041 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-12-02 10:41:34,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:41:34,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:34,242 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:34,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1529740093, now seen corresponding path program 1 times [2024-12-02 10:41:34,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922965076] [2024-12-02 10:41:34,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:34,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:34,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:34,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:34,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:41:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:34,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 10:41:34,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:34,439 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:34,439 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922965076] [2024-12-02 10:41:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922965076] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:34,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931516287] [2024-12-02 10:41:34,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:34,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:41:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:34,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:41:34,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:41:34,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-12-02 10:41:34,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:34,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:34,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-12-02 10:41:34,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:34,691 INFO L124 PetriNetUnfolderBase]: 482/979 cut-off events. [2024-12-02 10:41:34,691 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 10:41:34,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 979 events. 482/979 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5079 event pairs, 368 based on Foata normal form. 2/873 useless extension candidates. Maximal degree in co-relation 1754. Up to 753 conditions per place. [2024-12-02 10:41:34,696 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 40 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-12-02 10:41:34,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 298 flow [2024-12-02 10:41:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:41:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:41:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-12-02 10:41:34,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7490196078431373 [2024-12-02 10:41:34,698 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 3 states and 191 transitions. [2024-12-02 10:41:34,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 298 flow [2024-12-02 10:41:34,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:41:34,700 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 205 flow [2024-12-02 10:41:34,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-12-02 10:41:34,701 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-12-02 10:41:34,701 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 205 flow [2024-12-02 10:41:34,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:34,701 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:34,701 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:34,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:41:34,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:34,902 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:34,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1529738488, now seen corresponding path program 1 times [2024-12-02 10:41:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894495228] [2024-12-02 10:41:34,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:34,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:34,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:34,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:41:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:35,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:41:35,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:35,131 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 [2024-12-02 10:41:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:35,154 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:35,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894495228] [2024-12-02 10:41:35,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894495228] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:35,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:35,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81850121] [2024-12-02 10:41:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:35,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:35,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:35,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:35,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2024-12-02 10:41:35,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:35,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:35,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2024-12-02 10:41:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:35,538 INFO L124 PetriNetUnfolderBase]: 482/975 cut-off events. [2024-12-02 10:41:35,538 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-12-02 10:41:35,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 975 events. 482/975 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5074 event pairs, 368 based on Foata normal form. 2/873 useless extension candidates. Maximal degree in co-relation 1750. Up to 757 conditions per place. [2024-12-02 10:41:35,541 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-12-02 10:41:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 283 flow [2024-12-02 10:41:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-12-02 10:41:35,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441176470588236 [2024-12-02 10:41:35,543 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 205 flow. Second operand 4 states and 219 transitions. [2024-12-02 10:41:35,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 283 flow [2024-12-02 10:41:35,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:41:35,545 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 206 flow [2024-12-02 10:41:35,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-12-02 10:41:35,546 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-12-02 10:41:35,546 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 206 flow [2024-12-02 10:41:35,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:35,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:35,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:35,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:41:35,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:35,747 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:35,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1529738487, now seen corresponding path program 1 times [2024-12-02 10:41:35,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:35,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945920907] [2024-12-02 10:41:35,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:35,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:35,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:35,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:35,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:41:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:35,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 10:41:35,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:35,940 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 [2024-12-02 10:41:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:35,951 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:35,951 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945920907] [2024-12-02 10:41:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945920907] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:35,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067670243] [2024-12-02 10:41:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:35,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:35,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:35,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:35,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:36,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 85 [2024-12-02 10:41:36,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:36,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:36,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 85 [2024-12-02 10:41:36,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:36,250 INFO L124 PetriNetUnfolderBase]: 482/971 cut-off events. [2024-12-02 10:41:36,250 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 10:41:36,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 971 events. 482/971 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5061 event pairs, 368 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 1754. Up to 755 conditions per place. [2024-12-02 10:41:36,253 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 34 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-12-02 10:41:36,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 284 flow [2024-12-02 10:41:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:41:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:41:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-12-02 10:41:36,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5976470588235294 [2024-12-02 10:41:36,255 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 206 flow. Second operand 5 states and 254 transitions. [2024-12-02 10:41:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 284 flow [2024-12-02 10:41:36,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:36,257 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 208 flow [2024-12-02 10:41:36,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-12-02 10:41:36,257 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-12-02 10:41:36,257 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 208 flow [2024-12-02 10:41:36,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:36,258 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:36,258 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:36,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:41:36,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:36,458 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:36,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1199884184, now seen corresponding path program 1 times [2024-12-02 10:41:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010328249] [2024-12-02 10:41:36,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:36,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:36,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:41:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:36,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 10:41:36,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:36,757 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 10:41:36,758 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 [2024-12-02 10:41:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:36,787 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:36,787 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010328249] [2024-12-02 10:41:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010328249] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:36,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:36,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:41:36,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90215245] [2024-12-02 10:41:36,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:36,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:36,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:36,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:36,898 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-12-02 10:41:36,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:36,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-12-02 10:41:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:37,158 INFO L124 PetriNetUnfolderBase]: 482/967 cut-off events. [2024-12-02 10:41:37,159 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-12-02 10:41:37,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 967 events. 482/967 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5028 event pairs, 368 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 1748. Up to 755 conditions per place. [2024-12-02 10:41:37,164 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-12-02 10:41:37,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 282 flow [2024-12-02 10:41:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-12-02 10:41:37,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-12-02 10:41:37,166 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 208 flow. Second operand 4 states and 221 transitions. [2024-12-02 10:41:37,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 282 flow [2024-12-02 10:41:37,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 10:41:37,168 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2024-12-02 10:41:37,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-12-02 10:41:37,169 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2024-12-02 10:41:37,169 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2024-12-02 10:41:37,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:37,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:37,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:37,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:41:37,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:37,370 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:37,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1199884185, now seen corresponding path program 1 times [2024-12-02 10:41:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365567518] [2024-12-02 10:41:37,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:37,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:37,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:41:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:37,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 10:41:37,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:37,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 10:41:37,774 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 [2024-12-02 10:41:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:37,832 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:37,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:37,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365567518] [2024-12-02 10:41:37,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365567518] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:37,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:37,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092961251] [2024-12-02 10:41:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:37,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:41:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:37,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:41:37,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:41:38,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2024-12-02 10:41:38,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:38,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:38,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2024-12-02 10:41:38,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:38,460 INFO L124 PetriNetUnfolderBase]: 483/997 cut-off events. [2024-12-02 10:41:38,460 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-12-02 10:41:38,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1829 conditions, 997 events. 483/997 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5368 event pairs, 368 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 1741. Up to 761 conditions per place. [2024-12-02 10:41:38,465 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 43 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-12-02 10:41:38,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 324 flow [2024-12-02 10:41:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-12-02 10:41:38,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2024-12-02 10:41:38,467 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 231 transitions. [2024-12-02 10:41:38,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 324 flow [2024-12-02 10:41:38,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:38,469 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2024-12-02 10:41:38,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-12-02 10:41:38,470 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-12-02 10:41:38,470 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2024-12-02 10:41:38,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:38,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:38,470 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:38,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:41:38,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:38,671 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:38,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1458295394, now seen corresponding path program 1 times [2024-12-02 10:41:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088309873] [2024-12-02 10:41:38,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:38,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:41:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:38,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 10:41:38,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:39,019 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 [2024-12-02 10:41:39,024 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 [2024-12-02 10:41:39,081 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 [2024-12-02 10:41:39,091 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 [2024-12-02 10:41:39,152 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 10:41:39,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 10:41:39,173 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 10:41:39,173 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 [2024-12-02 10:41:39,231 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 [2024-12-02 10:41:39,245 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 [2024-12-02 10:41:39,276 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 [2024-12-02 10:41:39,285 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 [2024-12-02 10:41:39,312 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 [2024-12-02 10:41:39,317 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 [2024-12-02 10:41:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:39,361 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:39,361 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088309873] [2024-12-02 10:41:39,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088309873] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:39,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:39,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 10:41:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351998751] [2024-12-02 10:41:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:39,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:41:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:39,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:41:39,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:41:40,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 85 [2024-12-02 10:41:40,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:40,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:40,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 85 [2024-12-02 10:41:40,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:40,865 INFO L124 PetriNetUnfolderBase]: 483/996 cut-off events. [2024-12-02 10:41:40,865 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-12-02 10:41:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 996 events. 483/996 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5348 event pairs, 368 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 1775. Up to 774 conditions per place. [2024-12-02 10:41:40,871 INFO L140 encePairwiseOnDemand]: 74/85 looper letters, 59 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-12-02 10:41:40,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 412 flow [2024-12-02 10:41:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:41:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 10:41:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 379 transitions. [2024-12-02 10:41:40,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44588235294117645 [2024-12-02 10:41:40,874 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 10 states and 379 transitions. [2024-12-02 10:41:40,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 412 flow [2024-12-02 10:41:40,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:41:40,876 INFO L231 Difference]: Finished difference. Result has 94 places, 83 transitions, 286 flow [2024-12-02 10:41:40,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2024-12-02 10:41:40,877 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2024-12-02 10:41:40,877 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 286 flow [2024-12-02 10:41:40,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:40,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:40,877 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:40,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:41:41,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:41,078 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:41,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1458295395, now seen corresponding path program 1 times [2024-12-02 10:41:41,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:41,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514274540] [2024-12-02 10:41:41,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:41,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:41,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:41,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:41:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:41,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 10:41:41,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:41,381 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 [2024-12-02 10:41:41,415 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 [2024-12-02 10:41:41,449 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 10:41:41,450 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 [2024-12-02 10:41:41,483 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 16 treesize of output 11 [2024-12-02 10:41:41,514 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 [2024-12-02 10:41:41,541 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 [2024-12-02 10:41:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:41,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:41,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514274540] [2024-12-02 10:41:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514274540] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 10:41:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032816856] [2024-12-02 10:41:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:41,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:41:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:41,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:41:41,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:41:42,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2024-12-02 10:41:42,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:42,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:42,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2024-12-02 10:41:42,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:43,282 INFO L124 PetriNetUnfolderBase]: 483/995 cut-off events. [2024-12-02 10:41:43,282 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-12-02 10:41:43,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 995 events. 483/995 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5370 event pairs, 368 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 1813. Up to 770 conditions per place. [2024-12-02 10:41:43,286 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-12-02 10:41:43,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 450 flow [2024-12-02 10:41:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:41:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 10:41:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2024-12-02 10:41:43,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2024-12-02 10:41:43,288 INFO L175 Difference]: Start difference. First operand has 94 places, 83 transitions, 286 flow. Second operand 11 states and 430 transitions. [2024-12-02 10:41:43,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 450 flow [2024-12-02 10:41:43,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 95 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:41:43,290 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 312 flow [2024-12-02 10:41:43,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=312, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2024-12-02 10:41:43,291 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 19 predicate places. [2024-12-02 10:41:43,291 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 312 flow [2024-12-02 10:41:43,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:43,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:43,291 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:43,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:41:43,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:43,492 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:43,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2037483477, now seen corresponding path program 1 times [2024-12-02 10:41:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128517575] [2024-12-02 10:41:43,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:43,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:43,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:43,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:41:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:43,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 10:41:43,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:43,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-12-02 10:41:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:43,732 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:43,732 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128517575] [2024-12-02 10:41:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128517575] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:43,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038231731] [2024-12-02 10:41:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:43,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:43,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:43,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2024-12-02 10:41:43,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:43,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:43,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2024-12-02 10:41:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:44,017 INFO L124 PetriNetUnfolderBase]: 483/987 cut-off events. [2024-12-02 10:41:44,017 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-12-02 10:41:44,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 987 events. 483/987 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5308 event pairs, 368 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 1804. Up to 754 conditions per place. [2024-12-02 10:41:44,021 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 39 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-12-02 10:41:44,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 404 flow [2024-12-02 10:41:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-12-02 10:41:44,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441176470588236 [2024-12-02 10:41:44,023 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 312 flow. Second operand 4 states and 219 transitions. [2024-12-02 10:41:44,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 404 flow [2024-12-02 10:41:44,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-02 10:41:44,025 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2024-12-02 10:41:44,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-12-02 10:41:44,026 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-12-02 10:41:44,026 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2024-12-02 10:41:44,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:44,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:44,026 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:44,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:41:44,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:44,226 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:44,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2037483478, now seen corresponding path program 1 times [2024-12-02 10:41:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:44,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391182806] [2024-12-02 10:41:44,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:44,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:44,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:44,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:44,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:41:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:44,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 10:41:44,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:44,468 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 [2024-12-02 10:41:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:44,514 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:41:44,514 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:44,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391182806] [2024-12-02 10:41:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391182806] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:41:44,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:41:44,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:41:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511737272] [2024-12-02 10:41:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:41:44,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:41:44,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:44,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:41:44,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:41:44,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2024-12-02 10:41:44,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:44,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:44,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2024-12-02 10:41:44,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:44,888 INFO L124 PetriNetUnfolderBase]: 483/979 cut-off events. [2024-12-02 10:41:44,888 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-12-02 10:41:44,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 979 events. 483/979 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5218 event pairs, 368 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 1797. Up to 754 conditions per place. [2024-12-02 10:41:44,892 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-12-02 10:41:44,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 80 transitions, 394 flow [2024-12-02 10:41:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:41:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:41:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2024-12-02 10:41:44,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-12-02 10:41:44,894 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 4 states and 225 transitions. [2024-12-02 10:41:44,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 80 transitions, 394 flow [2024-12-02 10:41:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:44,896 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 302 flow [2024-12-02 10:41:44,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-12-02 10:41:44,896 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-12-02 10:41:44,896 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 302 flow [2024-12-02 10:41:44,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:44,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:44,897 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:44,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:41:45,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:45,097 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:45,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1467063877, now seen corresponding path program 1 times [2024-12-02 10:41:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:45,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7863729] [2024-12-02 10:41:45,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:45,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:45,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:45,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:41:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:45,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 10:41:45,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:45,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:41:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:45,391 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:45,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7863729] [2024-12-02 10:41:45,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7863729] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:41:45,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:41:45,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-12-02 10:41:45,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682627451] [2024-12-02 10:41:45,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:41:45,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:41:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:45,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:41:45,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:41:45,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-12-02 10:41:45,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:45,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:45,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-12-02 10:41:45,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:45,714 INFO L124 PetriNetUnfolderBase]: 483/1029 cut-off events. [2024-12-02 10:41:45,714 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-12-02 10:41:45,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1029 events. 483/1029 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5237 event pairs, 368 based on Foata normal form. 6/942 useless extension candidates. Maximal degree in co-relation 1923. Up to 750 conditions per place. [2024-12-02 10:41:45,718 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-12-02 10:41:45,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 554 flow [2024-12-02 10:41:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:41:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:41:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 354 transitions. [2024-12-02 10:41:45,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2024-12-02 10:41:45,720 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 302 flow. Second operand 6 states and 354 transitions. [2024-12-02 10:41:45,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 554 flow [2024-12-02 10:41:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 510 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:45,721 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2024-12-02 10:41:45,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-12-02 10:41:45,722 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2024-12-02 10:41:45,722 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2024-12-02 10:41:45,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:45,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:45,722 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:45,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:41:45,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:45,923 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:45,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash 239816287, now seen corresponding path program 1 times [2024-12-02 10:41:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106118869] [2024-12-02 10:41:45,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:45,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:45,925 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:45,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:41:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:46,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 10:41:46,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:46,219 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 [2024-12-02 10:41:46,349 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 [2024-12-02 10:41:46,423 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-12-02 10:41:46,423 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 [2024-12-02 10:41:46,472 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 [2024-12-02 10:41:46,521 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 [2024-12-02 10:41:46,551 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 [2024-12-02 10:41:46,586 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 [2024-12-02 10:41:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:46,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:41:46,789 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_574) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-12-02 10:41:46,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:46,939 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 [2024-12-02 10:41:46,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:46,953 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 [2024-12-02 10:41:46,960 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 [2024-12-02 10:41:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-12-02 10:41:48,473 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106118869] [2024-12-02 10:41:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106118869] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:41:48,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:41:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-12-02 10:41:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244666458] [2024-12-02 10:41:48,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:41:48,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:41:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:48,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:41:48,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=218, Unknown=10, NotChecked=30, Total=306 [2024-12-02 10:41:48,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 85 [2024-12-02 10:41:48,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 370 flow. Second operand has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:48,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:48,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 85 [2024-12-02 10:41:48,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:50,665 INFO L124 PetriNetUnfolderBase]: 1518/2685 cut-off events. [2024-12-02 10:41:50,665 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-12-02 10:41:50,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 2685 events. 1518/2685 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15307 event pairs, 1287 based on Foata normal form. 0/1901 useless extension candidates. Maximal degree in co-relation 5218. Up to 2340 conditions per place. [2024-12-02 10:41:50,676 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 62 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-12-02 10:41:50,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 582 flow [2024-12-02 10:41:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:41:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 10:41:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-12-02 10:41:50,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2160427807486631 [2024-12-02 10:41:50,678 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 370 flow. Second operand 11 states and 202 transitions. [2024-12-02 10:41:50,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 582 flow [2024-12-02 10:41:50,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 96 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 10:41:50,680 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 444 flow [2024-12-02 10:41:50,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2024-12-02 10:41:50,680 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2024-12-02 10:41:50,680 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 444 flow [2024-12-02 10:41:50,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:50,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:50,681 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:41:50,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 10:41:50,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:50,881 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:50,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 239816288, now seen corresponding path program 1 times [2024-12-02 10:41:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:50,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66285961] [2024-12-02 10:41:50,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:41:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:50,883 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:50,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:41:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:41:51,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 10:41:51,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:41:51,185 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 [2024-12-02 10:41:51,190 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 [2024-12-02 10:41:51,418 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 [2024-12-02 10:41:51,423 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 [2024-12-02 10:41:51,487 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-12-02 10:41:51,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2024-12-02 10:41:51,524 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-12-02 10:41:51,524 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 [2024-12-02 10:41:51,565 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 [2024-12-02 10:41:51,575 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 [2024-12-02 10:41:51,615 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 [2024-12-02 10:41:51,623 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 [2024-12-02 10:41:51,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-12-02 10:41:51,650 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 [2024-12-02 10:41:51,686 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 [2024-12-02 10:41:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:41:51,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:41:51,837 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse1)))))) is different from false [2024-12-02 10:41:51,873 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2024-12-02 10:41:52,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,078 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 [2024-12-02 10:41:52,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,087 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 [2024-12-02 10:41:52,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,106 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 [2024-12-02 10:41:52,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,138 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 [2024-12-02 10:41:52,149 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 [2024-12-02 10:41:52,157 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 [2024-12-02 10:41:52,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,671 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 [2024-12-02 10:41:52,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:41:52,688 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 [2024-12-02 10:41:52,696 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 [2024-12-02 10:41:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-12-02 10:41:55,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:41:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66285961] [2024-12-02 10:41:55,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66285961] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:41:55,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:41:55,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-12-02 10:41:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806191767] [2024-12-02 10:41:55,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:41:55,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:41:55,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:41:55,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:41:55,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=5, NotChecked=58, Total=306 [2024-12-02 10:41:55,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 85 [2024-12-02 10:41:55,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 90 transitions, 444 flow. Second operand has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:55,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:41:55,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 85 [2024-12-02 10:41:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:41:59,356 INFO L124 PetriNetUnfolderBase]: 2199/3496 cut-off events. [2024-12-02 10:41:59,356 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-12-02 10:41:59,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 3496 events. 2199/3496 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18214 event pairs, 1920 based on Foata normal form. 6/2092 useless extension candidates. Maximal degree in co-relation 7153. Up to 3399 conditions per place. [2024-12-02 10:41:59,370 INFO L140 encePairwiseOnDemand]: 75/85 looper letters, 65 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-12-02 10:41:59,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 640 flow [2024-12-02 10:41:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:41:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 10:41:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-12-02 10:41:59,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13846153846153847 [2024-12-02 10:41:59,373 INFO L175 Difference]: Start difference. First operand has 111 places, 90 transitions, 444 flow. Second operand 13 states and 153 transitions. [2024-12-02 10:41:59,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 640 flow [2024-12-02 10:41:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 610 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-12-02 10:41:59,375 INFO L231 Difference]: Finished difference. Result has 122 places, 92 transitions, 480 flow [2024-12-02 10:41:59,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=122, PETRI_TRANSITIONS=92} [2024-12-02 10:41:59,375 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2024-12-02 10:41:59,375 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 92 transitions, 480 flow [2024-12-02 10:41:59,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:41:59,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:41:59,376 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-12-02 10:41:59,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:41:59,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:59,576 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:41:59,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:41:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash -553195843, now seen corresponding path program 2 times [2024-12-02 10:41:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:41:59,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049293318] [2024-12-02 10:41:59,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:41:59,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:41:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:41:59,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:41:59,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 10:42:01,066 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:42:01,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:42:01,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 10:42:01,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:42:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:42:01,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:42:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:42:01,288 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:42:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049293318] [2024-12-02 10:42:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049293318] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:42:01,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:42:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-12-02 10:42:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618758968] [2024-12-02 10:42:01,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:42:01,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 10:42:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:42:01,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 10:42:01,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:42:01,290 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 85 [2024-12-02 10:42:01,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 92 transitions, 480 flow. Second operand has 12 states, 12 states have (on average 53.916666666666664) internal successors, (647), 12 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:42:01,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:42:01,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 85 [2024-12-02 10:42:01,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:42:02,251 INFO L124 PetriNetUnfolderBase]: 483/1137 cut-off events. [2024-12-02 10:42:02,251 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-12-02 10:42:02,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1137 events. 483/1137 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5202 event pairs, 368 based on Foata normal form. 12/1063 useless extension candidates. Maximal degree in co-relation 2483. Up to 750 conditions per place. [2024-12-02 10:42:02,255 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 84 selfloop transitions, 23 changer transitions 0/144 dead transitions. [2024-12-02 10:42:02,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 144 transitions, 1210 flow [2024-12-02 10:42:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 10:42:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 10:42:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 687 transitions. [2024-12-02 10:42:02,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6735294117647059 [2024-12-02 10:42:02,257 INFO L175 Difference]: Start difference. First operand has 122 places, 92 transitions, 480 flow. Second operand 12 states and 687 transitions. [2024-12-02 10:42:02,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 144 transitions, 1210 flow [2024-12-02 10:42:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1058 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-12-02 10:42:02,262 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 687 flow [2024-12-02 10:42:02,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2024-12-02 10:42:02,262 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2024-12-02 10:42:02,262 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 687 flow [2024-12-02 10:42:02,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.916666666666664) internal successors, (647), 12 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:42:02,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:42:02,262 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-12-02 10:42:02,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 10:42:02,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:42:02,463 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-12-02 10:42:02,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:42:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1485783043, now seen corresponding path program 3 times [2024-12-02 10:42:02,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:42:02,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938350781] [2024-12-02 10:42:02,465 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:42:02,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:42:02,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:42:02,467 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:42:02,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b7e2150-0047-4762-99c2-483c9420cc64/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process