./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:35:52,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:35:52,220 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-30 10:35:52,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:35:52,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:35:52,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:35:52,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:35:52,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:35:52,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:35:52,243 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:35:52,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:35:52,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:35:52,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:35:52,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:35:52,244 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:35:52,245 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:35:52,245 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:35:52,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:35:52,246 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:35:52,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:35:52,246 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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2025-04-30 10:35:52,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:35:52,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:35:52,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:35:52,460 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:35:52,461 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:35:52,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.i [2025-04-30 10:35:53,792 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7ea249c/380f4e3a00804382b7e0b2afe8055972/FLAGbc7415139 [2025-04-30 10:35:54,050 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:35:54,050 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.i [2025-04-30 10:35:54,061 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7ea249c/380f4e3a00804382b7e0b2afe8055972/FLAGbc7415139 [2025-04-30 10:35:54,793 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7ea249c/380f4e3a00804382b7e0b2afe8055972 [2025-04-30 10:35:54,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:35:54,796 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:35:54,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:35:54,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:35:54,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:35:54,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:35:54" (1/1) ... [2025-04-30 10:35:54,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47efbb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:35:54, skipping insertion in model container [2025-04-30 10:35:54,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:35:54" (1/1) ... [2025-04-30 10:35:54,829 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:35:55,168 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:55,168 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:55,170 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:55,170 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:55,189 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:35:55,217 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) [2025-04-30 10:35:55,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d371feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:35:55, skipping insertion in model container [2025-04-30 10:35:55,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:35:55,218 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-04-30 10:35:55,219 INFO L158 Benchmark]: Toolchain (without parser) took 422.70ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 85.5MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-30 10:35:55,219 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:35:55,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.97ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 85.5MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-30 10:35:55,222 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.97ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 85.5MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1038]: 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 ../../../trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:35:56,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:35:56,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-04-30 10:35:56,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:35:56,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:35:56,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:35:56,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:35:56,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:35:56,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:35:56,907 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:35:56,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:35:56,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:35:56,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:35:56,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:35:56,907 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:35:56,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-30 10:35:56,908 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:35:56,909 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:35:56,910 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:35:56,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:35:56,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:35:56,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:35:56,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:35:56,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:35:56,911 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-04-30 10:35:56,911 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-04-30 10:35:56,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:35:56,912 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:35:56,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:35:56,912 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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2025-04-30 10:35:57,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:35:57,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:35:57,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:35:57,186 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:35:57,186 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:35:57,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.i [2025-04-30 10:35:58,532 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f2f0bd2/b9264bfe679b49aebae20bbda5d9f0d6/FLAGb0ab2f8ce [2025-04-30 10:35:58,768 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:35:58,770 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_22-nocollapse.i [2025-04-30 10:35:58,785 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f2f0bd2/b9264bfe679b49aebae20bbda5d9f0d6/FLAGb0ab2f8ce [2025-04-30 10:35:59,532 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f2f0bd2/b9264bfe679b49aebae20bbda5d9f0d6 [2025-04-30 10:35:59,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:35:59,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:35:59,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:35:59,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:35:59,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:35:59,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:35:59" (1/1) ... [2025-04-30 10:35:59,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fdfe9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:35:59, skipping insertion in model container [2025-04-30 10:35:59,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:35:59" (1/1) ... [2025-04-30 10:35:59,571 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:35:59,918 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:59,918 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:59,919 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:59,920 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:35:59,951 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:35:59,996 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-04-30 10:36:00,005 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:36:00,049 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,050 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,050 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,050 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,067 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:36:00,087 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:36:00,146 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,146 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,147 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,147 WARN L1765 CHandler]: Possible shadowing of function new [2025-04-30 10:36:00,154 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:36:00,205 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:36:00,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00 WrapperNode [2025-04-30 10:36:00,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:36:00,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:36:00,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:36:00,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:36:00,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,258 INFO L138 Inliner]: procedures = 275, calls = 98, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 179 [2025-04-30 10:36:00,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:36:00,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:36:00,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:36:00,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:36:00,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,273 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,298 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2025-04-30 10:36:00,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,307 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:36:00,318 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:36:00,318 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:36:00,318 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:36:00,319 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (1/1) ... [2025-04-30 10:36:00,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:36:00,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:00,349 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) [2025-04-30 10:36:00,353 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 [2025-04-30 10:36:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-04-30 10:36:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-04-30 10:36:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-04-30 10:36:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-30 10:36:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-04-30 10:36:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-30 10:36:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-30 10:36:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:36:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:36:00,381 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-30 10:36:00,502 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:36:00,503 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:36:00,952 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-30 10:36:00,953 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:36:01,927 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:36:01,927 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-30 10:36:01,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:36:01 BoogieIcfgContainer [2025-04-30 10:36:01,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:36:01,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:36:01,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:36:01,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:36:01,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:35:59" (1/3) ... [2025-04-30 10:36:01,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64341789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:36:01, skipping insertion in model container [2025-04-30 10:36:01,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:36:00" (2/3) ... [2025-04-30 10:36:01,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64341789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:36:01, skipping insertion in model container [2025-04-30 10:36:01,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:36:01" (3/3) ... [2025-04-30 10:36:01,936 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_22-nocollapse.i [2025-04-30 10:36:01,946 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:36:01,947 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_22-nocollapse.i that has 2 procedures, 60 locations, 62 edges, 1 initial locations, 4 loop locations, and 29 error locations. [2025-04-30 10:36:01,947 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-30 10:36:02,009 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-30 10:36:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2025-04-30 10:36:02,071 INFO L116 PetriNetUnfolderBase]: 6/83 cut-off events. [2025-04-30 10:36:02,074 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-30 10:36:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 337 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-04-30 10:36:02,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2025-04-30 10:36:02,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2025-04-30 10:36:02,086 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:36:02,094 INFO L340 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;@4d40ddc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:36:02,094 INFO L341 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2025-04-30 10:36:02,102 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-30 10:36:02,103 INFO L116 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-04-30 10:36:02,103 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-30 10:36:02,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:02,103 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-04-30 10:36:02,103 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:02,107 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 507510, now seen corresponding path program 1 times [2025-04-30 10:36:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:02,116 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444210413] [2025-04-30 10:36:02,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:02,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:02,119 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) [2025-04-30 10:36:02,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:36:02,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-30 10:36:02,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-30 10:36:02,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:02,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:02,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-30 10:36:02,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:02,380 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:02,380 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:02,381 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444210413] [2025-04-30 10:36:02,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444210413] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:02,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:36:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177127437] [2025-04-30 10:36:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:02,387 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:36:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:02,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:36:02,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:36:02,578 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2025-04-30 10:36:02,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:02,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:02,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2025-04-30 10:36:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:02,890 INFO L116 PetriNetUnfolderBase]: 389/864 cut-off events. [2025-04-30 10:36:02,890 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:36:02,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 864 events. 389/864 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5032 event pairs, 287 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 1440. Up to 606 conditions per place. [2025-04-30 10:36:02,902 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2025-04-30 10:36:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 234 flow [2025-04-30 10:36:02,904 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2025-04-30 10:36:02,913 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2025-04-30 10:36:02,915 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 223 transitions. [2025-04-30 10:36:02,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 234 flow [2025-04-30 10:36:02,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:36:02,923 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2025-04-30 10:36:02,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-04-30 10:36:02,929 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-04-30 10:36:02,929 INFO L485 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2025-04-30 10:36:02,929 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:02,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:02,930 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-04-30 10:36:02,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:36:03,134 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:03,134 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:03,135 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 507511, now seen corresponding path program 1 times [2025-04-30 10:36:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:03,135 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125925196] [2025-04-30 10:36:03,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:03,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:03,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:03,137 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) [2025-04-30 10:36:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:36:03,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-30 10:36:03,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-30 10:36:03,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:03,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:03,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-30 10:36:03,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:03,404 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:03,404 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:03,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125925196] [2025-04-30 10:36:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125925196] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:03,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:03,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:36:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026659198] [2025-04-30 10:36:03,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:03,406 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:36:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:03,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:36:03,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:36:03,562 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-04-30 10:36:03,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-04-30 10:36:03,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:03,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-04-30 10:36:03,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:03,854 INFO L116 PetriNetUnfolderBase]: 390/869 cut-off events. [2025-04-30 10:36:03,854 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-30 10:36:03,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 869 events. 390/869 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4982 event pairs, 287 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 1480. Up to 611 conditions per place. [2025-04-30 10:36:03,863 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 36 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2025-04-30 10:36:03,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 262 flow [2025-04-30 10:36:03,865 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2025-04-30 10:36:03,866 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2025-04-30 10:36:03,866 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 236 transitions. [2025-04-30 10:36:03,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 262 flow [2025-04-30 10:36:03,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:36:03,871 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2025-04-30 10:36:03,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2025-04-30 10:36:03,873 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-04-30 10:36:03,873 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2025-04-30 10:36:03,873 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-04-30 10:36:03,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:03,873 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-30 10:36:03,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-30 10:36:04,073 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:04,074 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:04,074 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2060185368, now seen corresponding path program 1 times [2025-04-30 10:36:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:04,075 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888499203] [2025-04-30 10:36:04,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:04,077 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) [2025-04-30 10:36:04,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:36:04,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-30 10:36:04,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-30 10:36:04,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:04,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:04,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-30 10:36:04,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:04,311 INFO L354 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 [2025-04-30 10:36:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:04,320 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:04,320 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:04,320 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888499203] [2025-04-30 10:36:04,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888499203] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:04,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:04,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:36:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021916139] [2025-04-30 10:36:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:04,321 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:36:04,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:04,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:36:04,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:36:04,411 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-04-30 10:36:04,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-04-30 10:36:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-04-30 10:36:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:04,650 INFO L116 PetriNetUnfolderBase]: 390/868 cut-off events. [2025-04-30 10:36:04,650 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-30 10:36:04,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 868 events. 390/868 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4954 event pairs, 287 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 1486. Up to 607 conditions per place. [2025-04-30 10:36:04,656 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2025-04-30 10:36:04,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 273 flow [2025-04-30 10:36:04,657 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:36:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:36:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-04-30 10:36:04,658 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-04-30 10:36:04,658 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 187 transitions. [2025-04-30 10:36:04,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 273 flow [2025-04-30 10:36:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:36:04,660 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2025-04-30 10:36:04,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2025-04-30 10:36:04,660 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-04-30 10:36:04,660 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2025-04-30 10:36:04,661 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-04-30 10:36:04,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:04,661 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-30 10:36:04,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-30 10:36:04,861 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:04,862 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:04,862 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2060185369, now seen corresponding path program 1 times [2025-04-30 10:36:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:04,863 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609737325] [2025-04-30 10:36:04,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:04,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:04,865 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) [2025-04-30 10:36:04,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:36:04,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-30 10:36:05,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-30 10:36:05,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:05,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:05,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-30 10:36:05,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:05,060 INFO L354 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 [2025-04-30 10:36:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:05,063 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:05,063 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:05,063 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609737325] [2025-04-30 10:36:05,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609737325] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:05,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:05,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:36:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259315037] [2025-04-30 10:36:05,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:05,064 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:36:05,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:05,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:36:05,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:36:05,122 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-04-30 10:36:05,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-04-30 10:36:05,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:05,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-04-30 10:36:05,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:05,320 INFO L116 PetriNetUnfolderBase]: 390/867 cut-off events. [2025-04-30 10:36:05,320 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-30 10:36:05,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 867 events. 390/867 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4973 event pairs, 287 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 1485. Up to 607 conditions per place. [2025-04-30 10:36:05,324 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-04-30 10:36:05,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 274 flow [2025-04-30 10:36:05,326 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:36:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:36:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-04-30 10:36:05,326 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-04-30 10:36:05,326 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 187 transitions. [2025-04-30 10:36:05,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 274 flow [2025-04-30 10:36:05,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:36:05,328 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2025-04-30 10:36:05,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2025-04-30 10:36:05,328 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2025-04-30 10:36:05,328 INFO L485 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2025-04-30 10:36:05,329 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-04-30 10:36:05,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:05,329 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-04-30 10:36:05,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-30 10:36:05,529 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:05,529 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:05,530 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash 558763135, now seen corresponding path program 1 times [2025-04-30 10:36:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:05,531 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747220680] [2025-04-30 10:36:05,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:05,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:05,533 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) [2025-04-30 10:36:05,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-30 10:36:05,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-30 10:36:05,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-30 10:36:05,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:05,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:05,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-30 10:36:05,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:05,717 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:05,717 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:05,717 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747220680] [2025-04-30 10:36:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747220680] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:36:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603250306] [2025-04-30 10:36:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:05,718 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:36:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:05,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:36:05,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:36:05,719 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-04-30 10:36:05,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2025-04-30 10:36:05,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-04-30 10:36:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:05,916 INFO L116 PetriNetUnfolderBase]: 389/889 cut-off events. [2025-04-30 10:36:05,916 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-30 10:36:05,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 889 events. 389/889 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5004 event pairs, 287 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 1516. Up to 607 conditions per place. [2025-04-30 10:36:05,919 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 38 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-04-30 10:36:05,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 294 flow [2025-04-30 10:36:05,920 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:36:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:36:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2025-04-30 10:36:05,921 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2025-04-30 10:36:05,921 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 3 states and 195 transitions. [2025-04-30 10:36:05,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 294 flow [2025-04-30 10:36:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:36:05,922 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 205 flow [2025-04-30 10:36:05,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2025-04-30 10:36:05,923 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-04-30 10:36:05,923 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 205 flow [2025-04-30 10:36:05,923 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2025-04-30 10:36:05,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:05,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:05,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-30 10:36:06,123 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:06,124 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:06,124 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 558763513, now seen corresponding path program 1 times [2025-04-30 10:36:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:06,125 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304288169] [2025-04-30 10:36:06,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:06,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:06,126 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) [2025-04-30 10:36:06,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-30 10:36:06,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-30 10:36:06,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-30 10:36:06,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:06,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:06,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-30 10:36:06,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:06,304 INFO L354 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 [2025-04-30 10:36:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:06,313 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:06,313 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:06,313 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304288169] [2025-04-30 10:36:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304288169] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:06,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:06,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:36:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414105080] [2025-04-30 10:36:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:06,314 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:36:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:06,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:36:06,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:36:06,387 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2025-04-30 10:36:06,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:06,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:06,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2025-04-30 10:36:06,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:06,586 INFO L116 PetriNetUnfolderBase]: 389/885 cut-off events. [2025-04-30 10:36:06,586 INFO L117 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-04-30 10:36:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 885 events. 389/885 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4965 event pairs, 287 based on Foata normal form. 0/740 useless extension candidates. Maximal degree in co-relation 1515. Up to 609 conditions per place. [2025-04-30 10:36:06,591 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2025-04-30 10:36:06,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 279 flow [2025-04-30 10:36:06,591 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-30 10:36:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-30 10:36:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2025-04-30 10:36:06,592 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6164705882352941 [2025-04-30 10:36:06,592 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 205 flow. Second operand 5 states and 262 transitions. [2025-04-30 10:36:06,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 279 flow [2025-04-30 10:36:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:36:06,594 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 212 flow [2025-04-30 10:36:06,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2025-04-30 10:36:06,594 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2025-04-30 10:36:06,594 INFO L485 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 212 flow [2025-04-30 10:36:06,594 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:06,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:06,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:06,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-30 10:36:06,799 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:06,799 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:06,799 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash 558763514, now seen corresponding path program 1 times [2025-04-30 10:36:06,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:06,800 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748256086] [2025-04-30 10:36:06,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:06,803 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) [2025-04-30 10:36:06,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-30 10:36:06,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-30 10:36:06,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-30 10:36:06,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:06,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:06,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-30 10:36:06,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:07,003 INFO L354 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 [2025-04-30 10:36:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:07,022 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:07,022 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:07,023 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748256086] [2025-04-30 10:36:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748256086] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:36:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131248695] [2025-04-30 10:36:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:07,023 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:36:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:07,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:36:07,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:36:07,135 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2025-04-30 10:36:07,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2025-04-30 10:36:07,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:07,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2025-04-30 10:36:07,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:07,349 INFO L116 PetriNetUnfolderBase]: 389/881 cut-off events. [2025-04-30 10:36:07,350 INFO L117 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-04-30 10:36:07,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 881 events. 389/881 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4959 event pairs, 287 based on Foata normal form. 4/740 useless extension candidates. Maximal degree in co-relation 1514. Up to 611 conditions per place. [2025-04-30 10:36:07,354 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2025-04-30 10:36:07,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 286 flow [2025-04-30 10:36:07,354 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2025-04-30 10:36:07,356 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2025-04-30 10:36:07,356 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 212 flow. Second operand 4 states and 225 transitions. [2025-04-30 10:36:07,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 286 flow [2025-04-30 10:36:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:36:07,357 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 202 flow [2025-04-30 10:36:07,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2025-04-30 10:36:07,358 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-04-30 10:36:07,358 INFO L485 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 202 flow [2025-04-30 10:36:07,358 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2025-04-30 10:36:07,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:07,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:07,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-30 10:36:07,564 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:07,564 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:07,564 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash 100837660, now seen corresponding path program 1 times [2025-04-30 10:36:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:07,565 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795067464] [2025-04-30 10:36:07,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:07,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:07,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:07,567 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) [2025-04-30 10:36:07,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-30 10:36:07,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-30 10:36:07,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-30 10:36:07,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:07,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:07,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-30 10:36:07,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:07,807 INFO L325 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-04-30 10:36:07,808 INFO L354 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 [2025-04-30 10:36:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:07,865 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:07,865 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:07,865 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795067464] [2025-04-30 10:36:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795067464] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:36:07,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137797817] [2025-04-30 10:36:07,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:07,866 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-30 10:36:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:07,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-30 10:36:07,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:36:08,112 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2025-04-30 10:36:08,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 47.5) internal successors, (285), 6 states have internal predecessors, (285), 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) [2025-04-30 10:36:08,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:08,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2025-04-30 10:36:08,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:08,281 INFO L116 PetriNetUnfolderBase]: 389/877 cut-off events. [2025-04-30 10:36:08,281 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-30 10:36:08,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 877 events. 389/877 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4915 event pairs, 287 based on Foata normal form. 2/738 useless extension candidates. Maximal degree in co-relation 1512. Up to 613 conditions per place. [2025-04-30 10:36:08,285 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2025-04-30 10:36:08,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 276 flow [2025-04-30 10:36:08,286 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-04-30 10:36:08,286 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-04-30 10:36:08,286 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 202 flow. Second operand 4 states and 221 transitions. [2025-04-30 10:36:08,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 276 flow [2025-04-30 10:36:08,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:36:08,288 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2025-04-30 10:36:08,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-04-30 10:36:08,288 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2025-04-30 10:36:08,288 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2025-04-30 10:36:08,289 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.5) internal successors, (285), 6 states have internal predecessors, (285), 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) [2025-04-30 10:36:08,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:08,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:08,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-30 10:36:08,489 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:08,489 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:08,490 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 100837661, now seen corresponding path program 1 times [2025-04-30 10:36:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:08,490 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586135543] [2025-04-30 10:36:08,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:08,492 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) [2025-04-30 10:36:08,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-30 10:36:08,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-30 10:36:08,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-30 10:36:08,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:08,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:08,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-30 10:36:08,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:08,756 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-30 10:36:08,757 INFO L354 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 [2025-04-30 10:36:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:08,825 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:08,825 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:08,825 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586135543] [2025-04-30 10:36:08,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586135543] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:08,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:08,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:36:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558295518] [2025-04-30 10:36:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:08,826 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:36:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:08,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:36:08,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:36:09,029 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-04-30 10:36:09,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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) [2025-04-30 10:36:09,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:09,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-04-30 10:36:09,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:09,273 INFO L116 PetriNetUnfolderBase]: 390/907 cut-off events. [2025-04-30 10:36:09,273 INFO L117 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-04-30 10:36:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 907 events. 390/907 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5275 event pairs, 287 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 1503. Up to 615 conditions per place. [2025-04-30 10:36:09,277 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 41 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2025-04-30 10:36:09,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 320 flow [2025-04-30 10:36:09,278 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2025-04-30 10:36:09,279 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6970588235294117 [2025-04-30 10:36:09,279 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 237 transitions. [2025-04-30 10:36:09,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 320 flow [2025-04-30 10:36:09,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:36:09,282 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2025-04-30 10:36:09,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-04-30 10:36:09,283 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-04-30 10:36:09,283 INFO L485 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2025-04-30 10:36:09,284 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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) [2025-04-30 10:36:09,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:09,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:09,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-30 10:36:09,485 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:09,485 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:09,485 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1168999266, now seen corresponding path program 1 times [2025-04-30 10:36:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:09,486 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283614917] [2025-04-30 10:36:09,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:09,488 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) [2025-04-30 10:36:09,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-30 10:36:09,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-30 10:36:09,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-30 10:36:09,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:09,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:09,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-30 10:36:09,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:09,762 INFO L354 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 [2025-04-30 10:36:09,798 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-04-30 10:36:09,831 INFO L325 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-04-30 10:36:09,832 INFO L354 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 [2025-04-30 10:36:09,871 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:09,906 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:09,926 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:09,969 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:09,969 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:09,969 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283614917] [2025-04-30 10:36:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283614917] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:09,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:09,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-30 10:36:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669652766] [2025-04-30 10:36:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:09,970 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-30 10:36:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:09,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-30 10:36:09,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-04-30 10:36:10,901 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 85 [2025-04-30 10:36:10,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-04-30 10:36:10,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:10,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 85 [2025-04-30 10:36:10,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:11,512 INFO L116 PetriNetUnfolderBase]: 390/906 cut-off events. [2025-04-30 10:36:11,512 INFO L117 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-04-30 10:36:11,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 906 events. 390/906 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5276 event pairs, 287 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 1533. Up to 624 conditions per place. [2025-04-30 10:36:11,515 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-04-30 10:36:11,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 404 flow [2025-04-30 10:36:11,516 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:36:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-30 10:36:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 450 transitions. [2025-04-30 10:36:11,518 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48128342245989303 [2025-04-30 10:36:11,518 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 11 states and 450 transitions. [2025-04-30 10:36:11,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 404 flow [2025-04-30 10:36:11,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:36:11,520 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 292 flow [2025-04-30 10:36:11,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2025-04-30 10:36:11,520 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-04-30 10:36:11,520 INFO L485 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 292 flow [2025-04-30 10:36:11,523 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-04-30 10:36:11,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:11,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:11,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-30 10:36:11,723 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:11,724 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:11,724 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1168999265, now seen corresponding path program 1 times [2025-04-30 10:36:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:11,726 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31381544] [2025-04-30 10:36:11,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:11,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:11,727 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) [2025-04-30 10:36:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-30 10:36:11,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-30 10:36:11,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-30 10:36:11,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:11,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:11,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-30 10:36:11,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:11,991 INFO L354 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 [2025-04-30 10:36:12,008 INFO L354 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 [2025-04-30 10:36:12,051 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-04-30 10:36:12,062 INFO L354 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 [2025-04-30 10:36:12,118 INFO L325 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-04-30 10:36:12,118 INFO L354 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 [2025-04-30 10:36:12,124 INFO L354 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 [2025-04-30 10:36:12,170 INFO L354 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 [2025-04-30 10:36:12,184 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:12,221 INFO L354 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 [2025-04-30 10:36:12,226 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:12,254 INFO L354 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 [2025-04-30 10:36:12,259 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-04-30 10:36:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:12,304 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:12,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:12,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31381544] [2025-04-30 10:36:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31381544] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:12,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:12,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-30 10:36:12,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747036627] [2025-04-30 10:36:12,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:12,305 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-30 10:36:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:12,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-30 10:36:12,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-04-30 10:36:13,070 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2025-04-30 10:36:13,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:13,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:13,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2025-04-30 10:36:13,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:13,540 INFO L116 PetriNetUnfolderBase]: 390/905 cut-off events. [2025-04-30 10:36:13,540 INFO L117 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-04-30 10:36:13,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 905 events. 390/905 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5264 event pairs, 287 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 1582. Up to 628 conditions per place. [2025-04-30 10:36:13,544 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-04-30 10:36:13,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 456 flow [2025-04-30 10:36:13,545 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:36:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-30 10:36:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2025-04-30 10:36:13,547 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2025-04-30 10:36:13,547 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 292 flow. Second operand 11 states and 430 transitions. [2025-04-30 10:36:13,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 456 flow [2025-04-30 10:36:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:36:13,550 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 314 flow [2025-04-30 10:36:13,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=314, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2025-04-30 10:36:13,551 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2025-04-30 10:36:13,552 INFO L485 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 314 flow [2025-04-30 10:36:13,552 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:36:13,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:13,552 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:13,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-30 10:36:13,752 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:13,752 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:13,753 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1879238406, now seen corresponding path program 1 times [2025-04-30 10:36:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:13,753 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529049018] [2025-04-30 10:36:13,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:13,755 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) [2025-04-30 10:36:13,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-30 10:36:13,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-30 10:36:13,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-30 10:36:13,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:13,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:13,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-30 10:36:13,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:13,966 INFO L354 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 [2025-04-30 10:36:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:13,995 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:13,995 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:13,995 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529049018] [2025-04-30 10:36:13,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529049018] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:13,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:36:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156170266] [2025-04-30 10:36:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:13,995 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:36:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:13,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:36:13,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:36:14,077 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2025-04-30 10:36:14,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2025-04-30 10:36:14,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:14,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2025-04-30 10:36:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:14,250 INFO L116 PetriNetUnfolderBase]: 390/897 cut-off events. [2025-04-30 10:36:14,250 INFO L117 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-04-30 10:36:14,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 897 events. 390/897 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5215 event pairs, 287 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 1568. Up to 608 conditions per place. [2025-04-30 10:36:14,254 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2025-04-30 10:36:14,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 398 flow [2025-04-30 10:36:14,255 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:36:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:36:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2025-04-30 10:36:14,256 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2025-04-30 10:36:14,256 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 314 flow. Second operand 4 states and 231 transitions. [2025-04-30 10:36:14,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 398 flow [2025-04-30 10:36:14,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-04-30 10:36:14,258 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2025-04-30 10:36:14,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2025-04-30 10:36:14,260 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-04-30 10:36:14,260 INFO L485 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2025-04-30 10:36:14,260 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2025-04-30 10:36:14,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:14,260 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:14,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-04-30 10:36:14,461 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:14,461 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:14,461 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1879238407, now seen corresponding path program 1 times [2025-04-30 10:36:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:14,462 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321701543] [2025-04-30 10:36:14,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:14,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:14,463 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) [2025-04-30 10:36:14,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-30 10:36:14,522 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-30 10:36:14,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-30 10:36:14,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:14,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:14,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-30 10:36:14,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:14,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:36:14,662 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:14,662 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321701543] [2025-04-30 10:36:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321701543] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:36:14,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:36:14,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:36:14,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546401372] [2025-04-30 10:36:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:36:14,663 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:36:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:14,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:36:14,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:36:14,779 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2025-04-30 10:36:14,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2025-04-30 10:36:14,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2025-04-30 10:36:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:15,005 INFO L116 PetriNetUnfolderBase]: 390/889 cut-off events. [2025-04-30 10:36:15,006 INFO L117 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-04-30 10:36:15,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 889 events. 390/889 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5131 event pairs, 287 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 1580. Up to 610 conditions per place. [2025-04-30 10:36:15,010 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 38 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2025-04-30 10:36:15,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 400 flow [2025-04-30 10:36:15,011 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-30 10:36:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-30 10:36:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2025-04-30 10:36:15,012 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6211764705882353 [2025-04-30 10:36:15,012 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 5 states and 264 transitions. [2025-04-30 10:36:15,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 400 flow [2025-04-30 10:36:15,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 382 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-30 10:36:15,013 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 306 flow [2025-04-30 10:36:15,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2025-04-30 10:36:15,014 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2025-04-30 10:36:15,014 INFO L485 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 306 flow [2025-04-30 10:36:15,014 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2025-04-30 10:36:15,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:15,014 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:15,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-30 10:36:15,215 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:15,217 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:15,217 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1654793590, now seen corresponding path program 1 times [2025-04-30 10:36:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:15,217 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583468156] [2025-04-30 10:36:15,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:15,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:15,220 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) [2025-04-30 10:36:15,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-30 10:36:15,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-30 10:36:15,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-30 10:36:15,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:15,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:15,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-30 10:36:15,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:15,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:36:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:15,467 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:15,467 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583468156] [2025-04-30 10:36:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583468156] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:36:15,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:36:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-04-30 10:36:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775815958] [2025-04-30 10:36:15,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:36:15,468 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-30 10:36:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:15,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-30 10:36:15,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:36:15,468 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-04-30 10:36:15,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2025-04-30 10:36:15,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:36:15,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-04-30 10:36:15,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:36:15,712 INFO L116 PetriNetUnfolderBase]: 390/939 cut-off events. [2025-04-30 10:36:15,712 INFO L117 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-04-30 10:36:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 939 events. 390/939 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5156 event pairs, 287 based on Foata normal form. 6/809 useless extension candidates. Maximal degree in co-relation 1701. Up to 604 conditions per place. [2025-04-30 10:36:15,716 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 52 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2025-04-30 10:36:15,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 560 flow [2025-04-30 10:36:15,716 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:36:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:36:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2025-04-30 10:36:15,717 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7137254901960784 [2025-04-30 10:36:15,717 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 306 flow. Second operand 6 states and 364 transitions. [2025-04-30 10:36:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 560 flow [2025-04-30 10:36:15,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 506 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-30 10:36:15,719 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2025-04-30 10:36:15,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2025-04-30 10:36:15,720 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2025-04-30 10:36:15,721 INFO L485 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2025-04-30 10:36:15,721 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2025-04-30 10:36:15,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:36:15,721 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:36:15,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-30 10:36:15,921 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:15,921 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-04-30 10:36:15,922 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:36:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -309530957, now seen corresponding path program 1 times [2025-04-30 10:36:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-30 10:36:15,922 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484638930] [2025-04-30 10:36:15,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:36:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:36:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:36:15,924 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) [2025-04-30 10:36:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-30 10:36:15,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-30 10:36:16,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-30 10:36:16,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:36:16,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:36:16,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-30 10:36:16,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:36:16,258 INFO L354 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 [2025-04-30 10:36:16,306 INFO L325 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-04-30 10:36:16,307 INFO L354 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 [2025-04-30 10:36:16,345 INFO L354 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 [2025-04-30 10:36:16,385 INFO L354 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 [2025-04-30 10:36:16,442 INFO L354 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 [2025-04-30 10:36:16,518 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 27 treesize of output 15 [2025-04-30 10:36:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:16,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:36:17,000 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:36:17,000 INFO L354 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 [2025-04-30 10:36:17,020 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:36:17,020 INFO L354 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 [2025-04-30 10:36:17,026 INFO L354 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 [2025-04-30 10:36:34,428 INFO L325 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-04-30 10:36:34,429 INFO L354 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 85 treesize of output 272 [2025-04-30 10:36:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:36:34,886 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-30 10:36:34,886 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484638930] [2025-04-30 10:36:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484638930] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:36:34,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-30 10:36:34,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2025-04-30 10:36:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121528161] [2025-04-30 10:36:34,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-30 10:36:34,887 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-30 10:36:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-30 10:36:34,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-30 10:36:34,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=338, Unknown=21, NotChecked=0, Total=420 [2025-04-30 10:36:38,988 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:36:43,084 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:36:45,646 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:36:50,961 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:36:55,124 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:36:59,162 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-30 10:37:03,220 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15