./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:35,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:35,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:17:35,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:35,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:35,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:35,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:35,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:35,687 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:35,687 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:35,688 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:35,688 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:35,688 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:35,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:35,688 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:35,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:35,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:35,690 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:35,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:35,691 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:35,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:35,691 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-03-09 01:17:35,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:35,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:35,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:35,934 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:35,935 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:35,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-09 01:17:37,117 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2e965f6/d14a9424132a479fa1bd3be89f37c1f0/FLAG93657228b [2025-03-09 01:17:37,501 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:37,504 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-09 01:17:37,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2e965f6/d14a9424132a479fa1bd3be89f37c1f0/FLAG93657228b [2025-03-09 01:17:37,689 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2e965f6/d14a9424132a479fa1bd3be89f37c1f0 [2025-03-09 01:17:37,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:37,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:37,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:37,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:37,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:37,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:37" (1/1) ... [2025-03-09 01:17:37,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8f7f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:37, skipping insertion in model container [2025-03-09 01:17:37,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:37" (1/1) ... [2025-03-09 01:17:37,733 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:37,989 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:37,990 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:37,990 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:37,990 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:38,044 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) [2025-03-09 01:17:38,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3046c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:38, skipping insertion in model container [2025-03-09 01:17:38,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:38,046 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-09 01:17:38,049 INFO L158 Benchmark]: Toolchain (without parser) took 354.54ms. Allocated memory is still 142.6MB. Free memory was 102.5MB in the beginning and 86.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:17:38,049 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:17:38,049 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.14ms. Allocated memory is still 142.6MB. Free memory was 102.5MB in the beginning and 86.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:17:38,050 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.14ms. Allocated memory is still 142.6MB. Free memory was 102.5MB in the beginning and 86.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:39,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:39,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-09 01:17:39,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:39,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:39,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:39,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:39,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:39,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:39,790 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:39,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:39,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:39,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:39,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:39,790 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:39,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:39,791 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:39,792 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:39,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:39,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:39,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:39,793 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-03-09 01:17:40,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:40,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:40,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:40,042 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:40,042 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:40,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-09 01:17:41,200 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c78d8346/a7a10b6919ac4799a36b323342ae020b/FLAG78d2dbb59 [2025-03-09 01:17:41,479 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:41,481 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-09 01:17:41,497 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c78d8346/a7a10b6919ac4799a36b323342ae020b/FLAG78d2dbb59 [2025-03-09 01:17:41,769 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c78d8346/a7a10b6919ac4799a36b323342ae020b [2025-03-09 01:17:41,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:41,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:41,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:41,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:41,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:41,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:41" (1/1) ... [2025-03-09 01:17:41,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d6e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:41, skipping insertion in model container [2025-03-09 01:17:41,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:41" (1/1) ... [2025-03-09 01:17:41,812 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:42,070 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,070 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,070 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,071 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:42,129 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-09 01:17:42,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:42,182 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,182 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,183 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,183 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:42,224 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:17:42,255 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,256 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,256 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,256 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:42,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:42,330 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:17:42,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42 WrapperNode [2025-03-09 01:17:42,332 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:42,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:42,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:17:42,333 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:17:42,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,385 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 280 [2025-03-09 01:17:42,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:42,386 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:17:42,386 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:17:42,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:17:42,392 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,398 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,418 INFO L175 MemorySlicer]: Split 100 memory accesses to 4 slices as follows [2, 5, 91, 2]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 70, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2025-03-09 01:17:42,419 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,419 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,433 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:17:42,448 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:17:42,448 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:17:42,448 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:17:42,452 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:42,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:17:42,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-09 01:17:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-09 01:17:42,514 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-09 01:17:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:17:42,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:17:42,516 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:17:42,667 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:17:42,669 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:17:43,246 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-03-09 01:17:43,246 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-03-09 01:17:43,389 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:17:43,390 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:17:44,786 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:17:44,787 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:17:44,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:44 BoogieIcfgContainer [2025-03-09 01:17:44,787 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:17:44,789 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:17:44,789 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:17:44,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:17:44,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:17:41" (1/3) ... [2025-03-09 01:17:44,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2889d774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:44, skipping insertion in model container [2025-03-09 01:17:44,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42" (2/3) ... [2025-03-09 01:17:44,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2889d774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:44, skipping insertion in model container [2025-03-09 01:17:44,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:44" (3/3) ... [2025-03-09 01:17:44,794 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2025-03-09 01:17:44,803 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:17:44,804 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing-deref.i that has 2 procedures, 114 locations, 1 initial locations, 10 loop locations, and 48 error locations. [2025-03-09 01:17:44,805 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:17:44,896 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-09 01:17:44,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:44,970 INFO L124 PetriNetUnfolderBase]: 18/144 cut-off events. [2025-03-09 01:17:44,975 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-09 01:17:44,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 18/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 529 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2025-03-09 01:17:44,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:44,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:44,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:17:44,999 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;@56ec3c96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:17:44,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-03-09 01:17:45,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:17:45,010 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-03-09 01:17:45,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:17:45,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:45,011 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:45,011 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:45,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash 782609, now seen corresponding path program 1 times [2025-03-09 01:17:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822062469] [2025-03-09 01:17:45,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:45,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:45,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:17:45,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:45,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:45,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:45,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:45,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:17:45,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:45,334 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:45,335 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822062469] [2025-03-09 01:17:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822062469] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:45,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179047471] [2025-03-09 01:17:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:45,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:45,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:45,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:45,571 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-09 01:17:45,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:45,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:45,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-09 01:17:45,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:45,907 INFO L124 PetriNetUnfolderBase]: 120/455 cut-off events. [2025-03-09 01:17:45,907 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:17:45,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 455 events. 120/455 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2313 event pairs, 61 based on Foata normal form. 47/416 useless extension candidates. Maximal degree in co-relation 636. Up to 170 conditions per place. [2025-03-09 01:17:45,911 INFO L140 encePairwiseOnDemand]: 111/132 looper letters, 64 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2025-03-09 01:17:45,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 417 flow [2025-03-09 01:17:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2025-03-09 01:17:45,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7064393939393939 [2025-03-09 01:17:45,925 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 271 flow. Second operand 4 states and 373 transitions. [2025-03-09 01:17:45,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 417 flow [2025-03-09 01:17:45,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-09 01:17:45,931 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 251 flow [2025-03-09 01:17:45,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-09 01:17:45,934 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:45,934 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 251 flow [2025-03-09 01:17:45,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:45,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:45,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:45,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:46,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:46,136 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:46,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash 782610, now seen corresponding path program 1 times [2025-03-09 01:17:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:46,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520188083] [2025-03-09 01:17:46,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:46,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:46,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:46,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:17:46,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:46,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:46,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:46,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:46,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:17:46,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:46,418 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:46,418 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520188083] [2025-03-09 01:17:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520188083] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:46,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:46,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551420999] [2025-03-09 01:17:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:46,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:46,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:46,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:46,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:46,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 132 [2025-03-09 01:17:46,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:46,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:46,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 132 [2025-03-09 01:17:46,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:46,930 INFO L124 PetriNetUnfolderBase]: 122/503 cut-off events. [2025-03-09 01:17:46,931 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-09 01:17:46,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 503 events. 122/503 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2557 event pairs, 100 based on Foata normal form. 3/412 useless extension candidates. Maximal degree in co-relation 720. Up to 263 conditions per place. [2025-03-09 01:17:46,934 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 46 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2025-03-09 01:17:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 367 flow [2025-03-09 01:17:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2025-03-09 01:17:46,936 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2025-03-09 01:17:46,936 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 251 flow. Second operand 4 states and 342 transitions. [2025-03-09 01:17:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 367 flow [2025-03-09 01:17:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:46,939 INFO L231 Difference]: Finished difference. Result has 118 places, 119 transitions, 284 flow [2025-03-09 01:17:46,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=118, PETRI_TRANSITIONS=119} [2025-03-09 01:17:46,939 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:46,939 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 119 transitions, 284 flow [2025-03-09 01:17:46,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:46,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:46,940 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:46,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:47,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:47,141 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:47,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605529, now seen corresponding path program 1 times [2025-03-09 01:17:47,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:47,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396099438] [2025-03-09 01:17:47,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:47,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:17:47,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:47,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:47,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:47,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:47,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:17:47,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:47,369 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 [2025-03-09 01:17:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:47,374 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:47,374 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396099438] [2025-03-09 01:17:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396099438] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784069398] [2025-03-09 01:17:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:47,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:47,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:47,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:47,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:47,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-09 01:17:47,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 119 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:47,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:47,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-09 01:17:47,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:47,686 INFO L124 PetriNetUnfolderBase]: 122/502 cut-off events. [2025-03-09 01:17:47,687 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-09 01:17:47,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 502 events. 122/502 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2536 event pairs, 100 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 782. Up to 259 conditions per place. [2025-03-09 01:17:47,692 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2025-03-09 01:17:47,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 376 flow [2025-03-09 01:17:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-09 01:17:47,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-09 01:17:47,696 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 284 flow. Second operand 3 states and 269 transitions. [2025-03-09 01:17:47,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 376 flow [2025-03-09 01:17:47,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:47,699 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2025-03-09 01:17:47,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2025-03-09 01:17:47,701 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:47,701 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2025-03-09 01:17:47,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:47,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:47,702 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:47,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-09 01:17:47,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:47,903 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:47,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605530, now seen corresponding path program 1 times [2025-03-09 01:17:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836323870] [2025-03-09 01:17:47,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:47,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:47,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:47,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:17:47,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:48,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:48,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:48,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:48,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:17:48,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:48,149 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 [2025-03-09 01:17:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:48,158 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:48,158 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836323870] [2025-03-09 01:17:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836323870] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115713974] [2025-03-09 01:17:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:48,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:48,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:48,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:48,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-09 01:17:48,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:48,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-09 01:17:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:48,497 INFO L124 PetriNetUnfolderBase]: 122/501 cut-off events. [2025-03-09 01:17:48,497 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-09 01:17:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 501 events. 122/501 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2534 event pairs, 100 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 781. Up to 259 conditions per place. [2025-03-09 01:17:48,500 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2025-03-09 01:17:48,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 377 flow [2025-03-09 01:17:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-09 01:17:48,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-09 01:17:48,502 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 269 transitions. [2025-03-09 01:17:48,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 377 flow [2025-03-09 01:17:48,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 117 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:48,505 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 283 flow [2025-03-09 01:17:48,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2025-03-09 01:17:48,505 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-09 01:17:48,505 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 283 flow [2025-03-09 01:17:48,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:48,506 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-09 01:17:48,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:48,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:48,706 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:48,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1224199263, now seen corresponding path program 1 times [2025-03-09 01:17:48,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:48,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493439601] [2025-03-09 01:17:48,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:48,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:48,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:48,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:48,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:17:48,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:48,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:48,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:48,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:48,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 01:17:48,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:48,934 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:48,934 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493439601] [2025-03-09 01:17:48,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493439601] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:48,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:48,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:48,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121982244] [2025-03-09 01:17:48,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:48,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:48,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:48,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:48,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:17:48,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:48,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:17:48,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:49,185 INFO L124 PetriNetUnfolderBase]: 121/523 cut-off events. [2025-03-09 01:17:49,186 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-09 01:17:49,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 523 events. 121/523 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2577 event pairs, 100 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 812. Up to 259 conditions per place. [2025-03-09 01:17:49,189 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 48 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-03-09 01:17:49,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 121 transitions, 397 flow [2025-03-09 01:17:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2025-03-09 01:17:49,190 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6994949494949495 [2025-03-09 01:17:49,190 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 283 flow. Second operand 3 states and 277 transitions. [2025-03-09 01:17:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 121 transitions, 397 flow [2025-03-09 01:17:49,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:49,193 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 288 flow [2025-03-09 01:17:49,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2025-03-09 01:17:49,194 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:49,194 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 288 flow [2025-03-09 01:17:49,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:49,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:49,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:49,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:49,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,395 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:49,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1224197334, now seen corresponding path program 1 times [2025-03-09 01:17:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:49,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064170730] [2025-03-09 01:17:49,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:49,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:49,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:49,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:17:49,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:49,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:49,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:49,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:49,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:17:49,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:49,626 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:49,626 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064170730] [2025-03-09 01:17:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064170730] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:49,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937487799] [2025-03-09 01:17:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:49,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:49,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:49,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:49,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 132 [2025-03-09 01:17:49,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2025-03-09 01:17:49,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:49,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 132 [2025-03-09 01:17:49,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:49,913 INFO L124 PetriNetUnfolderBase]: 121/519 cut-off events. [2025-03-09 01:17:49,914 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-09 01:17:49,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 519 events. 121/519 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2535 event pairs, 100 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 811. Up to 264 conditions per place. [2025-03-09 01:17:49,917 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 44 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2025-03-09 01:17:49,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 382 flow [2025-03-09 01:17:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2025-03-09 01:17:49,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648989898989899 [2025-03-09 01:17:49,919 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 288 flow. Second operand 3 states and 257 transitions. [2025-03-09 01:17:49,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 382 flow [2025-03-09 01:17:49,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:49,922 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 291 flow [2025-03-09 01:17:49,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2025-03-09 01:17:49,923 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-09 01:17:49,923 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 291 flow [2025-03-09 01:17:49,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2025-03-09 01:17:49,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:49,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:49,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:50,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,124 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:50,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:50,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1224197335, now seen corresponding path program 1 times [2025-03-09 01:17:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786875109] [2025-03-09 01:17:50,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:50,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:50,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:50,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:17:50,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:50,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:50,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:50,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:50,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:17:50,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:50,369 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 [2025-03-09 01:17:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:50,391 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:50,391 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786875109] [2025-03-09 01:17:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786875109] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:50,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386480974] [2025-03-09 01:17:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:50,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:50,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:50,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:50,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:50,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:50,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:50,786 INFO L124 PetriNetUnfolderBase]: 121/515 cut-off events. [2025-03-09 01:17:50,787 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2025-03-09 01:17:50,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 515 events. 121/515 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2520 event pairs, 100 based on Foata normal form. 4/421 useless extension candidates. Maximal degree in co-relation 808. Up to 263 conditions per place. [2025-03-09 01:17:50,788 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2025-03-09 01:17:50,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 113 transitions, 385 flow [2025-03-09 01:17:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-09 01:17:50,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-09 01:17:50,790 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 291 flow. Second operand 4 states and 331 transitions. [2025-03-09 01:17:50,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 113 transitions, 385 flow [2025-03-09 01:17:50,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:50,792 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 285 flow [2025-03-09 01:17:50,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-03-09 01:17:50,792 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:50,792 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 285 flow [2025-03-09 01:17:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:50,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:50,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 01:17:50,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,993 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:50,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash -367378697, now seen corresponding path program 1 times [2025-03-09 01:17:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:50,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908823838] [2025-03-09 01:17:50,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:50,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:50,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:50,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:17:51,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:51,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:51,219 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:51,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:51,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:17:51,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:51,275 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-03-09 01:17:51,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2025-03-09 01:17:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:51,339 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:51,339 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:51,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908823838] [2025-03-09 01:17:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908823838] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:51,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:17:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087558182] [2025-03-09 01:17:51,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:51,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:17:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:51,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:17:51,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:17:51,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-09 01:17:51,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:51,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-09 01:17:51,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:51,928 INFO L124 PetriNetUnfolderBase]: 120/468 cut-off events. [2025-03-09 01:17:51,928 INFO L125 PetriNetUnfolderBase]: For 17/18 co-relation queries the response was YES. [2025-03-09 01:17:51,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 468 events. 120/468 cut-off events. For 17/18 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2250 event pairs, 61 based on Foata normal form. 3/388 useless extension candidates. Maximal degree in co-relation 768. Up to 177 conditions per place. [2025-03-09 01:17:51,930 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 67 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2025-03-09 01:17:51,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 469 flow [2025-03-09 01:17:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2025-03-09 01:17:51,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2025-03-09 01:17:51,932 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 285 flow. Second operand 4 states and 346 transitions. [2025-03-09 01:17:51,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 469 flow [2025-03-09 01:17:51,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:51,934 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 283 flow [2025-03-09 01:17:51,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2025-03-09 01:17:51,934 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2025-03-09 01:17:51,935 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 283 flow [2025-03-09 01:17:51,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:51,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:51,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 01:17:52,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:52,136 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:52,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash -367378696, now seen corresponding path program 1 times [2025-03-09 01:17:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:52,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400898137] [2025-03-09 01:17:52,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:52,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:17:52,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:52,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:52,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:52,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:52,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:17:52,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:17:52,465 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 [2025-03-09 01:17:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:52,516 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:52,516 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400898137] [2025-03-09 01:17:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400898137] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:52,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904649881] [2025-03-09 01:17:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:52,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:17:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:52,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:17:52,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:17:52,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:53,028 INFO L124 PetriNetUnfolderBase]: 123/542 cut-off events. [2025-03-09 01:17:53,028 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-09 01:17:53,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 542 events. 123/542 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2763 event pairs, 101 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 825. Up to 270 conditions per place. [2025-03-09 01:17:53,032 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 52 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2025-03-09 01:17:53,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 427 flow [2025-03-09 01:17:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2025-03-09 01:17:53,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2025-03-09 01:17:53,034 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 283 flow. Second operand 4 states and 340 transitions. [2025-03-09 01:17:53,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 427 flow [2025-03-09 01:17:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 411 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:53,037 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 319 flow [2025-03-09 01:17:53,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-09 01:17:53,039 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:53,039 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 319 flow [2025-03-09 01:17:53,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:53,039 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:53,040 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:53,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 01:17:53,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:53,240 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:53,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1496163068, now seen corresponding path program 1 times [2025-03-09 01:17:53,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:53,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764716250] [2025-03-09 01:17:53,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:53,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:53,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:53,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:53,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:17:53,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:17:53,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:17:53,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:53,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:53,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 01:17:53,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:53,551 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 [2025-03-09 01:17:53,588 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 [2025-03-09 01:17:53,631 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:17:53,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-09 01:17:53,669 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 [2025-03-09 01:17:53,703 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 [2025-03-09 01:17:53,729 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 [2025-03-09 01:17:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:53,756 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:53,756 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:53,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764716250] [2025-03-09 01:17:53,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764716250] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:53,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:53,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:17:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022112722] [2025-03-09 01:17:53,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:53,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:17:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:53,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:17:53,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:17:54,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 132 [2025-03-09 01:17:54,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:54,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:54,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 132 [2025-03-09 01:17:54,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:55,365 INFO L124 PetriNetUnfolderBase]: 123/541 cut-off events. [2025-03-09 01:17:55,365 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-09 01:17:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 541 events. 123/541 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2762 event pairs, 101 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 833. Up to 279 conditions per place. [2025-03-09 01:17:55,367 INFO L140 encePairwiseOnDemand]: 120/132 looper letters, 65 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2025-03-09 01:17:55,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 131 transitions, 509 flow [2025-03-09 01:17:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:17:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:17:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 714 transitions. [2025-03-09 01:17:55,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2025-03-09 01:17:55,369 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 319 flow. Second operand 11 states and 714 transitions. [2025-03-09 01:17:55,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 131 transitions, 509 flow [2025-03-09 01:17:55,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:55,372 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 375 flow [2025-03-09 01:17:55,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2025-03-09 01:17:55,374 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-09 01:17:55,374 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 375 flow [2025-03-09 01:17:55,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:55,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:55,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:55,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:17:55,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:55,576 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:55,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1496163069, now seen corresponding path program 1 times [2025-03-09 01:17:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901294543] [2025-03-09 01:17:55,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:55,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:55,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:55,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:17:55,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:17:55,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:17:55,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:55,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:55,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-09 01:17:55,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:55,886 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 [2025-03-09 01:17:55,894 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 [2025-03-09 01:17:55,930 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 [2025-03-09 01:17:55,938 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 [2025-03-09 01:17:55,985 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:17:55,985 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 [2025-03-09 01:17:55,996 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 [2025-03-09 01:17:56,036 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 [2025-03-09 01:17:56,050 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 [2025-03-09 01:17:56,089 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 [2025-03-09 01:17:56,106 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 [2025-03-09 01:17:56,132 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 [2025-03-09 01:17:56,137 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 [2025-03-09 01:17:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:56,175 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:56,175 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:56,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901294543] [2025-03-09 01:17:56,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901294543] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:56,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:17:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069086059] [2025-03-09 01:17:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:56,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:17:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:56,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:17:56,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:17:57,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 132 [2025-03-09 01:17:57,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:57,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:57,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 132 [2025-03-09 01:17:57,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:57,632 INFO L124 PetriNetUnfolderBase]: 123/540 cut-off events. [2025-03-09 01:17:57,632 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-09 01:17:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 540 events. 123/540 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2754 event pairs, 101 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 882. Up to 283 conditions per place. [2025-03-09 01:17:57,634 INFO L140 encePairwiseOnDemand]: 121/132 looper letters, 68 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2025-03-09 01:17:57,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 131 transitions, 561 flow [2025-03-09 01:17:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:17:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:17:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 638 transitions. [2025-03-09 01:17:57,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-09 01:17:57,641 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 375 flow. Second operand 10 states and 638 transitions. [2025-03-09 01:17:57,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 131 transitions, 561 flow [2025-03-09 01:17:57,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 131 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:57,646 INFO L231 Difference]: Finished difference. Result has 138 places, 120 transitions, 395 flow [2025-03-09 01:17:57,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=138, PETRI_TRANSITIONS=120} [2025-03-09 01:17:57,647 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2025-03-09 01:17:57,647 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 395 flow [2025-03-09 01:17:57,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:57,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:57,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:57,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:17:57,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:57,849 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:57,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:57,849 INFO L85 PathProgramCache]: Analyzing trace with hash -863584441, now seen corresponding path program 1 times [2025-03-09 01:17:57,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:57,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889527587] [2025-03-09 01:17:57,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:57,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:57,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:17:57,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:17:58,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:17:58,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:58,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:58,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:17:58,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:58,122 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 [2025-03-09 01:17:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:58,160 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:58,160 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:58,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889527587] [2025-03-09 01:17:58,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889527587] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:58,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:58,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549780724] [2025-03-09 01:17:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:58,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:58,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:58,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:58,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 132 [2025-03-09 01:17:58,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 120 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:58,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:58,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 132 [2025-03-09 01:17:58,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:58,580 INFO L124 PetriNetUnfolderBase]: 122/531 cut-off events. [2025-03-09 01:17:58,580 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-09 01:17:58,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 531 events. 122/531 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2707 event pairs, 100 based on Foata normal form. 8/446 useless extension candidates. Maximal degree in co-relation 856. Up to 260 conditions per place. [2025-03-09 01:17:58,583 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-03-09 01:17:58,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 118 transitions, 499 flow [2025-03-09 01:17:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2025-03-09 01:17:58,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2025-03-09 01:17:58,586 INFO L175 Difference]: Start difference. First operand has 138 places, 120 transitions, 395 flow. Second operand 4 states and 337 transitions. [2025-03-09 01:17:58,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 118 transitions, 499 flow [2025-03-09 01:17:58,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 118 transitions, 479 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-03-09 01:17:58,588 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 389 flow [2025-03-09 01:17:58,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2025-03-09 01:17:58,590 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-09 01:17:58,591 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 389 flow [2025-03-09 01:17:58,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:58,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:58,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:58,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 01:17:58,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:58,792 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:58,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash -863584442, now seen corresponding path program 1 times [2025-03-09 01:17:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607413177] [2025-03-09 01:17:58,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:58,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:17:58,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:17:58,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:17:58,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:58,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:59,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:17:59,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:59,030 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:59,030 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607413177] [2025-03-09 01:17:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607413177] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:17:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879139323] [2025-03-09 01:17:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:59,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:17:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:59,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:17:59,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:17:59,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-09 01:17:59,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-09 01:17:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:59,471 INFO L124 PetriNetUnfolderBase]: 122/523 cut-off events. [2025-03-09 01:17:59,472 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-03-09 01:17:59,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 523 events. 122/523 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2652 event pairs, 100 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 865. Up to 262 conditions per place. [2025-03-09 01:17:59,474 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 48 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-03-09 01:17:59,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 116 transitions, 503 flow [2025-03-09 01:17:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:17:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:17:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 394 transitions. [2025-03-09 01:17:59,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5969696969696969 [2025-03-09 01:17:59,475 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 389 flow. Second operand 5 states and 394 transitions. [2025-03-09 01:17:59,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 116 transitions, 503 flow [2025-03-09 01:17:59,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 116 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:59,477 INFO L231 Difference]: Finished difference. Result has 129 places, 116 transitions, 389 flow [2025-03-09 01:17:59,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2025-03-09 01:17:59,478 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 12 predicate places. [2025-03-09 01:17:59,478 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 389 flow [2025-03-09 01:17:59,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:59,478 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:59,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 01:17:59,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:59,679 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:59,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1546672742, now seen corresponding path program 1 times [2025-03-09 01:17:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380676457] [2025-03-09 01:17:59,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:59,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:59,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:59,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:17:59,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:17:59,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:17:59,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:59,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:59,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:17:59,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:59,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:17:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:59,950 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380676457] [2025-03-09 01:17:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380676457] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:17:59,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:17:59,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-09 01:17:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262990086] [2025-03-09 01:17:59,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:17:59,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:17:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:59,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:17:59,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:17:59,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:17:59,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 116 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:59,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:17:59,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:00,215 INFO L124 PetriNetUnfolderBase]: 122/573 cut-off events. [2025-03-09 01:18:00,216 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2025-03-09 01:18:00,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 573 events. 122/573 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2788 event pairs, 100 based on Foata normal form. 6/490 useless extension candidates. Maximal degree in co-relation 988. Up to 256 conditions per place. [2025-03-09 01:18:00,218 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 62 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-03-09 01:18:00,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 135 transitions, 663 flow [2025-03-09 01:18:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:18:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:18:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 518 transitions. [2025-03-09 01:18:00,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6540404040404041 [2025-03-09 01:18:00,220 INFO L175 Difference]: Start difference. First operand has 129 places, 116 transitions, 389 flow. Second operand 6 states and 518 transitions. [2025-03-09 01:18:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 135 transitions, 663 flow [2025-03-09 01:18:00,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 609 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:18:00,222 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 453 flow [2025-03-09 01:18:00,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2025-03-09 01:18:00,223 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 17 predicate places. [2025-03-09 01:18:00,224 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 453 flow [2025-03-09 01:18:00,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:00,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:00,224 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:00,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-09 01:18:00,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:00,424 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:00,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash -575276063, now seen corresponding path program 1 times [2025-03-09 01:18:00,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:00,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296207023] [2025-03-09 01:18:00,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:00,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:00,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:00,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:00,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:18:00,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:00,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:00,695 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:00,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:00,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 01:18:00,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:00,866 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 [2025-03-09 01:18:00,913 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-03-09 01:18:00,913 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 [2025-03-09 01:18:00,953 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 [2025-03-09 01:18:00,994 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 [2025-03-09 01:18:01,014 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 [2025-03-09 01:18:01,040 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 [2025-03-09 01:18:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:01,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:01,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:01,368 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 [2025-03-09 01:18:01,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:01,380 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 [2025-03-09 01:18:01,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2025-03-09 01:18:10,821 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-03-09 01:18:10,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2025-03-09 01:18:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:11,135 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296207023] [2025-03-09 01:18:11,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296207023] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:11,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:11,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-03-09 01:18:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242291451] [2025-03-09 01:18:11,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:11,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 01:18:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:11,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 01:18:11,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=275, Unknown=16, NotChecked=0, Total=342 [2025-03-09 01:18:13,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 132 [2025-03-09 01:18:13,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 453 flow. Second operand has 19 states, 19 states have (on average 30.68421052631579) internal successors, (583), 19 states have internal predecessors, (583), 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) [2025-03-09 01:18:13,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:13,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 132 [2025-03-09 01:18:13,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:14,973 INFO L124 PetriNetUnfolderBase]: 329/1030 cut-off events. [2025-03-09 01:18:14,973 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-09 01:18:14,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 1030 events. 329/1030 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5936 event pairs, 292 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 1910. Up to 679 conditions per place. [2025-03-09 01:18:14,977 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 77 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2025-03-09 01:18:14,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 132 transitions, 699 flow [2025-03-09 01:18:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:18:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:18:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 435 transitions. [2025-03-09 01:18:14,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2746212121212121 [2025-03-09 01:18:14,979 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 453 flow. Second operand 12 states and 435 transitions. [2025-03-09 01:18:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 132 transitions, 699 flow [2025-03-09 01:18:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 683 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:14,982 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 526 flow [2025-03-09 01:18:14,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=526, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2025-03-09 01:18:14,982 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 29 predicate places. [2025-03-09 01:18:14,983 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 526 flow [2025-03-09 01:18:14,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 30.68421052631579) internal successors, (583), 19 states have internal predecessors, (583), 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) [2025-03-09 01:18:14,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:14,983 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:14,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 01:18:15,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:15,184 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:15,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -575276062, now seen corresponding path program 1 times [2025-03-09 01:18:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557102547] [2025-03-09 01:18:15,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:15,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:15,186 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:15,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:18:15,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:15,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:15,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:15,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:15,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-09 01:18:15,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:15,460 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 [2025-03-09 01:18:15,616 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 [2025-03-09 01:18:15,624 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 [2025-03-09 01:18:15,665 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-09 01:18:15,665 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 [2025-03-09 01:18:15,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2025-03-09 01:18:15,702 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 [2025-03-09 01:18:15,713 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 [2025-03-09 01:18:15,746 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 [2025-03-09 01:18:15,752 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 [2025-03-09 01:18:15,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-09 01:18:15,770 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 [2025-03-09 01:18:15,799 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 [2025-03-09 01:18:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:15,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:16,060 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_677) |c_~#c~0.base|) .cse1))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_677) |c_~#c~0.base|) .cse1) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_678) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-09 01:18:16,101 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (forall ((v_ArrVal_672 (_ BitVec 32)) (v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_677) |c_~#c~0.base|) .cse0)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_672) (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_678) |c_~#c~0.base|) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))) (forall ((v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_677) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))))) is different from false [2025-03-09 01:18:16,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,124 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 [2025-03-09 01:18:16,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,137 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 [2025-03-09 01:18:16,144 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 [2025-03-09 01:18:16,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,193 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 [2025-03-09 01:18:16,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,199 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 [2025-03-09 01:18:16,201 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:16,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2025-03-09 01:18:16,220 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:16,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:16,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2025-03-09 01:18:17,261 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-03-09 01:18:17,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2025-03-09 01:18:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2025-03-09 01:18:17,613 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:17,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557102547] [2025-03-09 01:18:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557102547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:17,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:17,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-03-09 01:18:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197180351] [2025-03-09 01:18:17,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:17,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 01:18:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:17,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 01:18:17,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=319, Unknown=12, NotChecked=74, Total=462 [2025-03-09 01:18:18,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 132 [2025-03-09 01:18:18,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 526 flow. Second operand has 22 states, 22 states have (on average 20.545454545454547) internal successors, (452), 22 states have internal predecessors, (452), 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) [2025-03-09 01:18:18,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:18,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 132 [2025-03-09 01:18:18,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:21,488 INFO L124 PetriNetUnfolderBase]: 465/1262 cut-off events. [2025-03-09 01:18:21,488 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2025-03-09 01:18:21,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2566 conditions, 1262 events. 465/1262 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7440 event pairs, 422 based on Foata normal form. 6/843 useless extension candidates. Maximal degree in co-relation 2477. Up to 955 conditions per place. [2025-03-09 01:18:21,493 INFO L140 encePairwiseOnDemand]: 122/132 looper letters, 84 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2025-03-09 01:18:21,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 131 transitions, 764 flow [2025-03-09 01:18:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:18:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:18:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 362 transitions. [2025-03-09 01:18:21,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1958874458874459 [2025-03-09 01:18:21,494 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 526 flow. Second operand 14 states and 362 transitions. [2025-03-09 01:18:21,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 131 transitions, 764 flow [2025-03-09 01:18:21,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 131 transitions, 727 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-09 01:18:21,497 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 559 flow [2025-03-09 01:18:21,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=559, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2025-03-09 01:18:21,498 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 40 predicate places. [2025-03-09 01:18:21,498 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 559 flow [2025-03-09 01:18:21,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 20.545454545454547) internal successors, (452), 22 states have internal predecessors, (452), 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) [2025-03-09 01:18:21,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:21,498 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:21,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 01:18:21,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:21,699 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:21,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:21,699 INFO L85 PathProgramCache]: Analyzing trace with hash 622221695, now seen corresponding path program 1 times [2025-03-09 01:18:21,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:21,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448356816] [2025-03-09 01:18:21,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:21,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:21,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:21,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:21,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:18:21,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-09 01:18:22,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 01:18:22,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:22,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:22,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:18:22,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-09 01:18:22,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-09 01:18:22,131 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:22,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448356816] [2025-03-09 01:18:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448356816] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:22,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-03-09 01:18:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780201852] [2025-03-09 01:18:22,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:22,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:18:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:22,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:18:22,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:18:22,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:18:22,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 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) [2025-03-09 01:18:22,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:22,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:18:22,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:22,444 INFO L124 PetriNetUnfolderBase]: 124/668 cut-off events. [2025-03-09 01:18:22,444 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2025-03-09 01:18:22,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 668 events. 124/668 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2416 event pairs, 100 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1419. Up to 250 conditions per place. [2025-03-09 01:18:22,447 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 94 selfloop transitions, 6 changer transitions 0/165 dead transitions. [2025-03-09 01:18:22,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 165 transitions, 1083 flow [2025-03-09 01:18:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:18:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:18:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 527 transitions. [2025-03-09 01:18:22,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654040404040404 [2025-03-09 01:18:22,449 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 559 flow. Second operand 6 states and 527 transitions. [2025-03-09 01:18:22,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 165 transitions, 1083 flow [2025-03-09 01:18:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 165 transitions, 967 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-09 01:18:22,454 INFO L231 Difference]: Finished difference. Result has 155 places, 131 transitions, 566 flow [2025-03-09 01:18:22,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=155, PETRI_TRANSITIONS=131} [2025-03-09 01:18:22,455 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 38 predicate places. [2025-03-09 01:18:22,455 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 131 transitions, 566 flow [2025-03-09 01:18:22,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 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) [2025-03-09 01:18:22,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:22,456 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:22,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:22,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:22,657 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:22,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash 622221599, now seen corresponding path program 2 times [2025-03-09 01:18:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903603709] [2025-03-09 01:18:22,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:18:22,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:22,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:22,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:22,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:18:22,788 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 01:18:23,008 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 01:18:23,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:18:23,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:23,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:18:23,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:23,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:23,165 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903603709] [2025-03-09 01:18:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903603709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:23,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:23,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-09 01:18:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530999433] [2025-03-09 01:18:23,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:23,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:18:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:23,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:18:23,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:18:23,166 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:18:23,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 131 transitions, 566 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:23,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:23,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:18:23,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:23,931 INFO L124 PetriNetUnfolderBase]: 124/920 cut-off events. [2025-03-09 01:18:23,931 INFO L125 PetriNetUnfolderBase]: For 845/845 co-relation queries the response was YES. [2025-03-09 01:18:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 920 events. 124/920 cut-off events. For 845/845 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2484 event pairs, 100 based on Foata normal form. 24/863 useless extension candidates. Maximal degree in co-relation 2152. Up to 263 conditions per place. [2025-03-09 01:18:23,934 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 95 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2025-03-09 01:18:23,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 183 transitions, 1182 flow [2025-03-09 01:18:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:18:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:18:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1007 transitions. [2025-03-09 01:18:23,936 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6357323232323232 [2025-03-09 01:18:23,936 INFO L175 Difference]: Start difference. First operand has 155 places, 131 transitions, 566 flow. Second operand 12 states and 1007 transitions. [2025-03-09 01:18:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 183 transitions, 1182 flow [2025-03-09 01:18:23,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 1180 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:23,941 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 841 flow [2025-03-09 01:18:23,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=841, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2025-03-09 01:18:23,942 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 55 predicate places. [2025-03-09 01:18:23,942 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 841 flow [2025-03-09 01:18:23,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:23,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:23,942 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:23,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:24,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:24,143 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:24,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -838641601, now seen corresponding path program 3 times [2025-03-09 01:18:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971852796] [2025-03-09 01:18:24,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:18:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:24,148 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:24,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 01:18:24,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.