./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:41:46,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:41:46,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:41:46,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:41:46,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:41:46,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:41:46,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:41:46,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:41:46,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:41:46,708 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:41:46,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:41:46,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:41:46,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:41:46,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:41:46,710 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:41:46,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:41:46,711 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:41:46,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:41:46,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:41:46,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:41:46,712 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:41:46,712 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:41:46,712 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:41:46,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:41:46,713 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:41:46,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:41:46,714 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:41:46,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:41:46,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:41:46,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:41:46,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:41:46,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:41:46,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:41:46,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:41:46,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:41:46,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:41:46,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:41:46,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:41:46,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:41:46,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:41:46,717 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:41:46,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:41:46,717 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-10-14 19:41:46,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:41:46,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:41:46,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:41:46,947 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:41:46,947 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:41:46,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-14 19:41:48,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:41:48,470 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:41:48,470 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-14 19:41:48,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50059df1/ff926f887efc4518b27af918f8fcbec9/FLAG2266ae27b [2024-10-14 19:41:48,827 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50059df1/ff926f887efc4518b27af918f8fcbec9 [2024-10-14 19:41:48,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:41:48,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:41:48,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:48,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:41:48,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:41:48,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:48" (1/1) ... [2024-10-14 19:41:48,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bab1969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:48, skipping insertion in model container [2024-10-14 19:41:48,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:48" (1/1) ... [2024-10-14 19:41:48,871 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:41:49,209 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:49,213 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:49,213 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:49,213 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:49,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:49,271 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:41:49,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32e388e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:49, skipping insertion in model container [2024-10-14 19:41:49,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:49,272 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:41:49,274 INFO L158 Benchmark]: Toolchain (without parser) took 443.41ms. Allocated memory is still 197.1MB. Free memory was 124.3MB in the beginning and 164.4MB in the end (delta: -40.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-10-14 19:41:49,275 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 197.1MB. Free memory was 157.3MB in the beginning and 157.1MB in the end (delta: 181.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:41:49,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.14ms. Allocated memory is still 197.1MB. Free memory was 124.1MB in the beginning and 164.4MB in the end (delta: -40.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-10-14 19:41:49,277 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 197.1MB. Free memory was 157.3MB in the beginning and 157.1MB in the end (delta: 181.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 441.14ms. Allocated memory is still 197.1MB. Free memory was 124.1MB in the beginning and 164.4MB in the end (delta: -40.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:41:51,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:41:51,251 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:41:51,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:41:51,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:41:51,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:41:51,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:41:51,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:41:51,285 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:41:51,285 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:41:51,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:41:51,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:41:51,286 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:41:51,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:41:51,288 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:41:51,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:41:51,288 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:41:51,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:41:51,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:41:51,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:41:51,289 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:41:51,293 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:41:51,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:41:51,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:41:51,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:41:51,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:41:51,305 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:41:51,305 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:41:51,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:41:51,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:41:51,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:41:51,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:41:51,306 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:41:51,306 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-10-14 19:41:51,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:41:51,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:41:51,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:41:51,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:41:51,551 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:41:51,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-14 19:41:52,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:41:53,158 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:41:53,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-14 19:41:53,173 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43804b3a9/3eedd3a45c6a46e2b7b89a789c686cbe/FLAG3baa3413c [2024-10-14 19:41:53,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43804b3a9/3eedd3a45c6a46e2b7b89a789c686cbe [2024-10-14 19:41:53,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:41:53,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:41:53,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:53,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:41:53,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:41:53,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:53" (1/1) ... [2024-10-14 19:41:53,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc55c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:53, skipping insertion in model container [2024-10-14 19:41:53,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:41:53" (1/1) ... [2024-10-14 19:41:53,529 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:41:53,941 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:53,941 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:53,942 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:53,943 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:53,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:54,001 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:41:54,021 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:41:54,053 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,055 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,055 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,055 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:54,067 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:41:54,105 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,105 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,105 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,106 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-14 19:41:54,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:41:54,167 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:41:54,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54 WrapperNode [2024-10-14 19:41:54,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:41:54,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:41:54,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:41:54,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:41:54,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,238 INFO L138 Inliner]: procedures = 276, calls = 31, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2024-10-14 19:41:54,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:41:54,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:41:54,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:41:54,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:41:54,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,256 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,270 INFO L175 MemorySlicer]: Split 18 memory accesses to 1 slices as follows [18]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 12 writes are split as follows [12]. [2024-10-14 19:41:54,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:41:54,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:41:54,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:41:54,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:41:54,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (1/1) ... [2024-10-14 19:41:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:41:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:41:54,318 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) [2024-10-14 19:41:54,321 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 [2024-10-14 19:41:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:41:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-10-14 19:41:54,353 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-10-14 19:41:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 19:41:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:41:54,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:41:54,356 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:41:54,490 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:41:54,491 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:41:54,900 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:41:54,900 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:41:55,109 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:41:55,110 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:41:55,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:41:55 BoogieIcfgContainer [2024-10-14 19:41:55,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:41:55,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:41:55,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:41:55,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:41:55,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:41:53" (1/3) ... [2024-10-14 19:41:55,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497446d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:41:55, skipping insertion in model container [2024-10-14 19:41:55,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:41:54" (2/3) ... [2024-10-14 19:41:55,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497446d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:41:55, skipping insertion in model container [2024-10-14 19:41:55,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:41:55" (3/3) ... [2024-10-14 19:41:55,117 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2024-10-14 19:41:55,130 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:41:55,130 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2024-10-14 19:41:55,130 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:41:55,180 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 19:41:55,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 196 flow [2024-10-14 19:41:55,242 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2024-10-14 19:41:55,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:55,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 7/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-10-14 19:41:55,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 94 transitions, 196 flow [2024-10-14 19:41:55,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 190 flow [2024-10-14 19:41:55,259 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:41:55,265 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73d73796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:41:55,265 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2024-10-14 19:41:55,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:41:55,269 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-14 19:41:55,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:41:55,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:55,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:41:55,270 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:55,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:55,274 INFO L85 PathProgramCache]: Analyzing trace with hash 487905, now seen corresponding path program 1 times [2024-10-14 19:41:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:55,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865363] [2024-10-14 19:41:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:55,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:55,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:55,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:55,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:41:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:55,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:41:55,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:55,438 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:55,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865363] [2024-10-14 19:41:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865363] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:55,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:55,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482899835] [2024-10-14 19:41:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:55,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:55,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:55,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:55,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 94 [2024-10-14 19:41:55,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 94 [2024-10-14 19:41:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:55,877 INFO L124 PetriNetUnfolderBase]: 483/961 cut-off events. [2024-10-14 19:41:55,877 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:41:55,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 961 events. 483/961 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5084 event pairs, 368 based on Foata normal form. 1/862 useless extension candidates. Maximal degree in co-relation 1678. Up to 757 conditions per place. [2024-10-14 19:41:55,884 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-10-14 19:41:55,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 262 flow [2024-10-14 19:41:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:41:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:41:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 232 transitions. [2024-10-14 19:41:55,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-10-14 19:41:55,897 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 190 flow. Second operand 4 states and 232 transitions. [2024-10-14 19:41:55,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 262 flow [2024-10-14 19:41:55,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:41:55,903 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 182 flow [2024-10-14 19:41:55,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-10-14 19:41:55,909 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-10-14 19:41:55,910 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 182 flow [2024-10-14 19:41:55,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:55,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:55,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:41:55,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 19:41:56,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:56,115 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:56,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 487906, now seen corresponding path program 1 times [2024-10-14 19:41:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151972013] [2024-10-14 19:41:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:56,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:56,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:56,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:41:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:56,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:41:56,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:56,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:56,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151972013] [2024-10-14 19:41:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151972013] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:56,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329378493] [2024-10-14 19:41:56,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:56,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:56,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:56,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-10-14 19:41:56,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:56,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:56,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-10-14 19:41:56,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:56,683 INFO L124 PetriNetUnfolderBase]: 484/966 cut-off events. [2024-10-14 19:41:56,683 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:41:56,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1758 conditions, 966 events. 484/966 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5032 event pairs, 368 based on Foata normal form. 3/870 useless extension candidates. Maximal degree in co-relation 1730. Up to 762 conditions per place. [2024-10-14 19:41:56,692 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 43 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2024-10-14 19:41:56,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 290 flow [2024-10-14 19:41:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:41:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:41:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2024-10-14 19:41:56,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6675531914893617 [2024-10-14 19:41:56,698 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 182 flow. Second operand 4 states and 251 transitions. [2024-10-14 19:41:56,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 290 flow [2024-10-14 19:41:56,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 280 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:56,705 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 215 flow [2024-10-14 19:41:56,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-10-14 19:41:56,705 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-14 19:41:56,706 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 215 flow [2024-10-14 19:41:56,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:56,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:56,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:41:56,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:41:56,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:56,907 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:56,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:56,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1650717329, now seen corresponding path program 1 times [2024-10-14 19:41:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755958864] [2024-10-14 19:41:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:56,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:56,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:41:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:56,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:41:56,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:56,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:41:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:57,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:57,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755958864] [2024-10-14 19:41:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755958864] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194264944] [2024-10-14 19:41:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:57,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:41:57,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-10-14 19:41:57,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:57,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:57,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-10-14 19:41:57,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:57,278 INFO L124 PetriNetUnfolderBase]: 484/965 cut-off events. [2024-10-14 19:41:57,278 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:41:57,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 965 events. 484/965 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5018 event pairs, 368 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 1736. Up to 758 conditions per place. [2024-10-14 19:41:57,283 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2024-10-14 19:41:57,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 301 flow [2024-10-14 19:41:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-10-14 19:41:57,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-10-14 19:41:57,286 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 215 flow. Second operand 3 states and 200 transitions. [2024-10-14 19:41:57,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 301 flow [2024-10-14 19:41:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:41:57,288 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 216 flow [2024-10-14 19:41:57,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-10-14 19:41:57,289 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-14 19:41:57,289 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 216 flow [2024-10-14 19:41:57,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:57,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:57,290 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:41:57,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-14 19:41:57,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:57,491 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:57,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1650717330, now seen corresponding path program 1 times [2024-10-14 19:41:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668819817] [2024-10-14 19:41:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:57,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:57,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:57,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:41:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:57,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 19:41:57,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:57,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:41:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:57,568 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:57,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668819817] [2024-10-14 19:41:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668819817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:57,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:41:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843265121] [2024-10-14 19:41:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:57,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:41:57,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-10-14 19:41:57,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:57,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:57,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-10-14 19:41:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:57,829 INFO L124 PetriNetUnfolderBase]: 484/964 cut-off events. [2024-10-14 19:41:57,830 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 19:41:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 964 events. 484/964 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5009 event pairs, 368 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1735. Up to 758 conditions per place. [2024-10-14 19:41:57,834 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-10-14 19:41:57,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 302 flow [2024-10-14 19:41:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-10-14 19:41:57,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-10-14 19:41:57,836 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 216 flow. Second operand 3 states and 200 transitions. [2024-10-14 19:41:57,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 302 flow [2024-10-14 19:41:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:41:57,837 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 214 flow [2024-10-14 19:41:57,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-10-14 19:41:57,838 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2024-10-14 19:41:57,838 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 214 flow [2024-10-14 19:41:57,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:57,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:57,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:57,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:41:58,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:58,045 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:58,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -367369859, now seen corresponding path program 1 times [2024-10-14 19:41:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905676028] [2024-10-14 19:41:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:58,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:58,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:41:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:58,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:41:58,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:58,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:41:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:58,159 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:58,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905676028] [2024-10-14 19:41:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905676028] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:58,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:58,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:41:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913698836] [2024-10-14 19:41:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:58,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:58,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-10-14 19:41:58,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:58,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:58,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-10-14 19:41:58,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:58,512 INFO L124 PetriNetUnfolderBase]: 484/962 cut-off events. [2024-10-14 19:41:58,512 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 19:41:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 962 events. 484/962 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5006 event pairs, 368 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 1733. Up to 760 conditions per place. [2024-10-14 19:41:58,516 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 42 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-10-14 19:41:58,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 302 flow [2024-10-14 19:41:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:41:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:41:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-10-14 19:41:58,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-10-14 19:41:58,518 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 214 flow. Second operand 4 states and 240 transitions. [2024-10-14 19:41:58,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 302 flow [2024-10-14 19:41:58,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:41:58,520 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 212 flow [2024-10-14 19:41:58,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-10-14 19:41:58,520 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-10-14 19:41:58,521 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 212 flow [2024-10-14 19:41:58,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:58,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:58,521 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:58,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-14 19:41:58,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:58,722 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:58,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash -367369860, now seen corresponding path program 1 times [2024-10-14 19:41:58,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527309931] [2024-10-14 19:41:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:58,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:58,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:58,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:41:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:58,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:41:58,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:58,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:41:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:58,821 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:58,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527309931] [2024-10-14 19:41:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527309931] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:58,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:58,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:41:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273507637] [2024-10-14 19:41:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:58,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:41:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:41:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:41:58,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 94 [2024-10-14 19:41:58,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 212 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) [2024-10-14 19:41:58,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:58,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 94 [2024-10-14 19:41:58,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:59,206 INFO L124 PetriNetUnfolderBase]: 484/960 cut-off events. [2024-10-14 19:41:59,206 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:41:59,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 960 events. 484/960 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4995 event pairs, 368 based on Foata normal form. 1/866 useless extension candidates. Maximal degree in co-relation 1734. Up to 758 conditions per place. [2024-10-14 19:41:59,211 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 39 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-10-14 19:41:59,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 300 flow [2024-10-14 19:41:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:41:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:41:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-10-14 19:41:59,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5936170212765958 [2024-10-14 19:41:59,213 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 212 flow. Second operand 5 states and 279 transitions. [2024-10-14 19:41:59,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 300 flow [2024-10-14 19:41:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 292 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:41:59,214 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 214 flow [2024-10-14 19:41:59,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2024-10-14 19:41:59,215 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2024-10-14 19:41:59,215 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 214 flow [2024-10-14 19:41:59,215 INFO L472 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) [2024-10-14 19:41:59,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:59,216 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-14 19:41:59,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:41:59,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:59,416 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:59,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash -367368217, now seen corresponding path program 1 times [2024-10-14 19:41:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:59,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362918025] [2024-10-14 19:41:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:59,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:59,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:59,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:41:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:41:59,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:41:59,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:41:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:41:59,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:41:59,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:41:59,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362918025] [2024-10-14 19:41:59,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362918025] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:41:59,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:41:59,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:41:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207423878] [2024-10-14 19:41:59,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:41:59,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:41:59,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:41:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:41:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:41:59,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-14 19:41:59,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:59,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:41:59,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-14 19:41:59,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:41:59,691 INFO L124 PetriNetUnfolderBase]: 483/978 cut-off events. [2024-10-14 19:41:59,691 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-14 19:41:59,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 978 events. 483/978 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5024 event pairs, 368 based on Foata normal form. 2/877 useless extension candidates. Maximal degree in co-relation 1761. Up to 758 conditions per place. [2024-10-14 19:41:59,695 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 45 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-10-14 19:41:59,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 324 flow [2024-10-14 19:41:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:41:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:41:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-10-14 19:41:59,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7375886524822695 [2024-10-14 19:41:59,697 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 214 flow. Second operand 3 states and 208 transitions. [2024-10-14 19:41:59,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 324 flow [2024-10-14 19:41:59,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 304 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:41:59,699 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 211 flow [2024-10-14 19:41:59,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-10-14 19:41:59,699 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2024-10-14 19:41:59,700 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 211 flow [2024-10-14 19:41:59,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:41:59,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:41:59,700 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:41:59,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:41:59,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:59,903 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:41:59,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:41:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash -855104217, now seen corresponding path program 1 times [2024-10-14 19:41:59,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:41:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606530701] [2024-10-14 19:41:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:41:59,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:41:59,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:41:59,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:41:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:42:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:00,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:42:00,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:42:00,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 19:42:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:00,214 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:00,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606530701] [2024-10-14 19:42:00,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606530701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:00,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:00,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:42:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35681710] [2024-10-14 19:42:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:00,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:42:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:42:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:42:00,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-10-14 19:42:00,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 211 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) [2024-10-14 19:42:00,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:00,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-10-14 19:42:00,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:00,676 INFO L124 PetriNetUnfolderBase]: 484/1012 cut-off events. [2024-10-14 19:42:00,676 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-14 19:42:00,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 1012 events. 484/1012 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5395 event pairs, 368 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 1754. Up to 766 conditions per place. [2024-10-14 19:42:00,681 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 48 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-10-14 19:42:00,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 342 flow [2024-10-14 19:42:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:42:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:42:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 244 transitions. [2024-10-14 19:42:00,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-10-14 19:42:00,683 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 211 flow. Second operand 4 states and 244 transitions. [2024-10-14 19:42:00,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 342 flow [2024-10-14 19:42:00,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:42:00,685 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 254 flow [2024-10-14 19:42:00,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-10-14 19:42:00,686 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-14 19:42:00,686 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 254 flow [2024-10-14 19:42:00,686 INFO L472 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) [2024-10-14 19:42:00,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:00,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:00,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:42:00,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:00,892 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:00,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash -855104218, now seen corresponding path program 1 times [2024-10-14 19:42:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:00,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366591949] [2024-10-14 19:42:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:00,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:00,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:00,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:42:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:01,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:42:01,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:01,115 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:42:01,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-14 19:42:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:01,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:01,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366591949] [2024-10-14 19:42:01,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366591949] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:01,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:01,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:42:01,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494734243] [2024-10-14 19:42:01,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:01,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:42:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:42:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:42:01,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-10-14 19:42:01,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:01,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:01,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-10-14 19:42:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:01,576 INFO L124 PetriNetUnfolderBase]: 484/1004 cut-off events. [2024-10-14 19:42:01,576 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-14 19:42:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 1004 events. 484/1004 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5340 event pairs, 368 based on Foata normal form. 4/897 useless extension candidates. Maximal degree in co-relation 1770. Up to 766 conditions per place. [2024-10-14 19:42:01,581 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 41 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-10-14 19:42:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 346 flow [2024-10-14 19:42:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:42:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:42:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2024-10-14 19:42:01,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6223404255319149 [2024-10-14 19:42:01,583 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 254 flow. Second operand 4 states and 234 transitions. [2024-10-14 19:42:01,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 346 flow [2024-10-14 19:42:01,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:42:01,585 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 262 flow [2024-10-14 19:42:01,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-10-14 19:42:01,586 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-14 19:42:01,586 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 262 flow [2024-10-14 19:42:01,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:01,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:01,586 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:01,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-14 19:42:01,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:01,787 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:01,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash -738426425, now seen corresponding path program 1 times [2024-10-14 19:42:01,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:01,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7780965] [2024-10-14 19:42:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:01,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:01,791 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:01,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:42:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:01,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 19:42:01,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:01,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 19:42:02,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2024-10-14 19:42:02,052 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:42:02,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:42:02,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2024-10-14 19:42:02,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2024-10-14 19:42:02,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-10-14 19:42:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:02,202 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:02,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7780965] [2024-10-14 19:42:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7780965] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:02,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:02,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 19:42:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106623078] [2024-10-14 19:42:02,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:02,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:42:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:42:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:42:03,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 94 [2024-10-14 19:42:03,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:03,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:03,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 94 [2024-10-14 19:42:03,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:03,771 INFO L124 PetriNetUnfolderBase]: 484/1002 cut-off events. [2024-10-14 19:42:03,771 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-14 19:42:03,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 1002 events. 484/1002 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5300 event pairs, 368 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 1771. Up to 772 conditions per place. [2024-10-14 19:42:03,775 INFO L140 encePairwiseOnDemand]: 83/94 looper letters, 48 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2024-10-14 19:42:03,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 418 flow [2024-10-14 19:42:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:42:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:42:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 485 transitions. [2024-10-14 19:42:03,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4690522243713733 [2024-10-14 19:42:03,781 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 262 flow. Second operand 11 states and 485 transitions. [2024-10-14 19:42:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 418 flow [2024-10-14 19:42:03,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:42:03,783 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 327 flow [2024-10-14 19:42:03,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-10-14 19:42:03,784 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2024-10-14 19:42:03,784 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 327 flow [2024-10-14 19:42:03,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:03,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:03,785 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:03,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-10-14 19:42:03,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:03,986 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:03,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash -738426424, now seen corresponding path program 1 times [2024-10-14 19:42:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306323661] [2024-10-14 19:42:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:03,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:03,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:03,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:42:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:04,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-14 19:42:04,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:04,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 19:42:04,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 19:42:04,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-14 19:42:04,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-14 19:42:04,400 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:42:04,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:42:04,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 19:42:04,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-14 19:42:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:04,751 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:04,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:04,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306323661] [2024-10-14 19:42:04,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306323661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:04,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:04,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 19:42:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983935938] [2024-10-14 19:42:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:04,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:42:04,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:42:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:42:05,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 94 [2024-10-14 19:42:05,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:05,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:05,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 94 [2024-10-14 19:42:05,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:06,259 INFO L124 PetriNetUnfolderBase]: 484/1001 cut-off events. [2024-10-14 19:42:06,259 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-14 19:42:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 1001 events. 484/1001 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5322 event pairs, 368 based on Foata normal form. 1/908 useless extension candidates. Maximal degree in co-relation 1785. Up to 779 conditions per place. [2024-10-14 19:42:06,263 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 68 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-10-14 19:42:06,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 107 transitions, 538 flow [2024-10-14 19:42:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:42:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:42:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 437 transitions. [2024-10-14 19:42:06,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42263056092843326 [2024-10-14 19:42:06,265 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 327 flow. Second operand 11 states and 437 transitions. [2024-10-14 19:42:06,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 107 transitions, 538 flow [2024-10-14 19:42:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 520 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-14 19:42:06,267 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 370 flow [2024-10-14 19:42:06,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=370, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2024-10-14 19:42:06,268 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2024-10-14 19:42:06,268 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 370 flow [2024-10-14 19:42:06,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:06,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:06,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:06,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 19:42:06,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:06,475 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:06,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1416382236, now seen corresponding path program 1 times [2024-10-14 19:42:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:06,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560381385] [2024-10-14 19:42:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:06,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:06,479 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:42:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:06,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:42:06,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:06,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:42:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:06,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:06,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:06,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560381385] [2024-10-14 19:42:06,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560381385] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:06,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:06,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:42:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428662801] [2024-10-14 19:42:06,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:06,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:42:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:42:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:42:06,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2024-10-14 19:42:06,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:06,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:06,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2024-10-14 19:42:06,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:06,982 INFO L124 PetriNetUnfolderBase]: 484/993 cut-off events. [2024-10-14 19:42:06,983 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-10-14 19:42:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 993 events. 484/993 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5261 event pairs, 368 based on Foata normal form. 8/904 useless extension candidates. Maximal degree in co-relation 1787. Up to 759 conditions per place. [2024-10-14 19:42:06,987 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 44 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-10-14 19:42:06,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 476 flow [2024-10-14 19:42:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:42:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:42:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2024-10-14 19:42:06,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-10-14 19:42:06,989 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 370 flow. Second operand 4 states and 246 transitions. [2024-10-14 19:42:06,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 476 flow [2024-10-14 19:42:06,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 94 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:42:06,991 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 384 flow [2024-10-14 19:42:06,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2024-10-14 19:42:06,991 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2024-10-14 19:42:06,991 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 384 flow [2024-10-14 19:42:06,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:06,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:06,992 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:07,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-14 19:42:07,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:07,193 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:07,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1416382237, now seen corresponding path program 1 times [2024-10-14 19:42:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:07,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051855844] [2024-10-14 19:42:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:07,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:07,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:07,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:07,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:42:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:07,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:42:07,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:07,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:42:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:07,306 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:42:07,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051855844] [2024-10-14 19:42:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051855844] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:42:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:42:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:42:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4014690] [2024-10-14 19:42:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:42:07,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:42:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:42:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:42:07,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-10-14 19:42:07,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 384 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) [2024-10-14 19:42:07,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:07,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-10-14 19:42:07,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:07,599 INFO L124 PetriNetUnfolderBase]: 484/985 cut-off events. [2024-10-14 19:42:07,599 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-10-14 19:42:07,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 985 events. 484/985 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5177 event pairs, 368 based on Foata normal form. 0/896 useless extension candidates. Maximal degree in co-relation 1791. Up to 759 conditions per place. [2024-10-14 19:42:07,603 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 46 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2024-10-14 19:42:07,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 92 transitions, 494 flow [2024-10-14 19:42:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:42:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:42:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-10-14 19:42:07,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-10-14 19:42:07,605 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 384 flow. Second operand 4 states and 240 transitions. [2024-10-14 19:42:07,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 92 transitions, 494 flow [2024-10-14 19:42:07,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 92 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:42:07,608 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 380 flow [2024-10-14 19:42:07,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2024-10-14 19:42:07,609 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2024-10-14 19:42:07,609 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 380 flow [2024-10-14 19:42:07,609 INFO L472 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) [2024-10-14 19:42:07,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:07,609 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:07,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 19:42:07,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:07,810 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:07,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash 816812662, now seen corresponding path program 1 times [2024-10-14 19:42:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:07,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754753626] [2024-10-14 19:42:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:07,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:07,814 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:07,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:42:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:07,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:42:07,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:07,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:42:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:07,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754753626] [2024-10-14 19:42:07,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754753626] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:42:07,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:42:07,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-14 19:42:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099866651] [2024-10-14 19:42:07,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:42:07,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:42:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:42:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:42:07,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-14 19:42:07,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:07,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:07,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-14 19:42:07,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:08,284 INFO L124 PetriNetUnfolderBase]: 484/1035 cut-off events. [2024-10-14 19:42:08,284 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-10-14 19:42:08,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1035 events. 484/1035 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5217 event pairs, 368 based on Foata normal form. 6/948 useless extension candidates. Maximal degree in co-relation 1856. Up to 755 conditions per place. [2024-10-14 19:42:08,289 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 59 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-10-14 19:42:08,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 632 flow [2024-10-14 19:42:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:42:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:42:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-10-14 19:42:08,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6790780141843972 [2024-10-14 19:42:08,292 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 380 flow. Second operand 6 states and 383 transitions. [2024-10-14 19:42:08,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 632 flow [2024-10-14 19:42:08,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:42:08,295 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 446 flow [2024-10-14 19:42:08,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=446, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-10-14 19:42:08,296 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 21 predicate places. [2024-10-14 19:42:08,296 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 446 flow [2024-10-14 19:42:08,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:08,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:08,296 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:08,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 19:42:08,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:08,497 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:08,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1667229480, now seen corresponding path program 1 times [2024-10-14 19:42:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:08,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427797916] [2024-10-14 19:42:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:08,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:08,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:08,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:42:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:08,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 19:42:08,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:08,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:42:08,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 19:42:09,013 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2024-10-14 19:42:09,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2024-10-14 19:42:09,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-10-14 19:42:09,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-10-14 19:42:09,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-10-14 19:42:09,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-10-14 19:42:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:09,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:42:09,324 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_619 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_619) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-10-14 19:42:09,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:09,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-10-14 19:42:09,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:09,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2024-10-14 19:42:09,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-10-14 19:42:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-10-14 19:42:10,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427797916] [2024-10-14 19:42:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427797916] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:42:10,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:42:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2024-10-14 19:42:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504959958] [2024-10-14 19:42:10,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:42:10,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 19:42:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 19:42:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=189, Unknown=7, NotChecked=28, Total=272 [2024-10-14 19:42:10,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 94 [2024-10-14 19:42:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 446 flow. Second operand has 17 states, 17 states have (on average 14.235294117647058) internal successors, (242), 17 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:10,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 94 [2024-10-14 19:42:10,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:12,568 INFO L124 PetriNetUnfolderBase]: 1519/2691 cut-off events. [2024-10-14 19:42:12,569 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-14 19:42:12,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 2691 events. 1519/2691 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15299 event pairs, 1287 based on Foata normal form. 0/1905 useless extension candidates. Maximal degree in co-relation 5134. Up to 2346 conditions per place. [2024-10-14 19:42:12,584 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 68 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-10-14 19:42:12,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 102 transitions, 644 flow [2024-10-14 19:42:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:42:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:42:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-10-14 19:42:12,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.1950354609929078 [2024-10-14 19:42:12,588 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 446 flow. Second operand 12 states and 220 transitions. [2024-10-14 19:42:12,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 102 transitions, 644 flow [2024-10-14 19:42:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 102 transitions, 626 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-10-14 19:42:12,590 INFO L231 Difference]: Finished difference. Result has 122 places, 96 transitions, 472 flow [2024-10-14 19:42:12,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2024-10-14 19:42:12,591 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 30 predicate places. [2024-10-14 19:42:12,591 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 472 flow [2024-10-14 19:42:12,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.235294117647058) internal successors, (242), 17 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:12,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:12,591 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:42:12,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-14 19:42:12,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:12,792 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:12,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1667229479, now seen corresponding path program 1 times [2024-10-14 19:42:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487259503] [2024-10-14 19:42:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:42:12,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:12,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:12,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 19:42:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:42:13,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-14 19:42:13,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:13,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:42:13,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 19:42:13,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 19:42:13,514 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:42:13,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:42:13,553 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-10-14 19:42:13,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-10-14 19:42:13,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-10-14 19:42:13,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-14 19:42:13,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-14 19:42:13,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-10-14 19:42:13,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-14 19:42:13,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:42:13,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 19:42:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:13,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:42:14,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:14,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 109 [2024-10-14 19:42:14,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:14,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 85 [2024-10-14 19:42:14,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:14,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 121 [2024-10-14 19:42:14,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:14,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 163 [2024-10-14 19:42:14,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2024-10-14 19:42:14,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2024-10-14 19:42:14,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 19:42:14,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 112 [2024-10-14 19:42:14,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2024-10-14 19:42:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:15,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487259503] [2024-10-14 19:42:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487259503] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:42:15,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:42:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2024-10-14 19:42:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340436293] [2024-10-14 19:42:15,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:42:15,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 19:42:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 19:42:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=209, Unknown=20, NotChecked=0, Total=272 [2024-10-14 19:42:22,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:42:27,858 WARN L539 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] [2024-10-14 19:42:34,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 94 [2024-10-14 19:42:34,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 472 flow. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:34,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:34,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 94 [2024-10-14 19:42:34,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:37,655 INFO L124 PetriNetUnfolderBase]: 2200/3502 cut-off events. [2024-10-14 19:42:37,655 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-14 19:42:37,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 3502 events. 2200/3502 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18224 event pairs, 1920 based on Foata normal form. 6/2095 useless extension candidates. Maximal degree in co-relation 7026. Up to 3404 conditions per place. [2024-10-14 19:42:37,671 INFO L140 encePairwiseOnDemand]: 84/94 looper letters, 72 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2024-10-14 19:42:37,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 101 transitions, 678 flow [2024-10-14 19:42:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:42:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:42:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 164 transitions. [2024-10-14 19:42:37,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.1453900709219858 [2024-10-14 19:42:37,674 INFO L175 Difference]: Start difference. First operand has 122 places, 96 transitions, 472 flow. Second operand 12 states and 164 transitions. [2024-10-14 19:42:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 101 transitions, 678 flow [2024-10-14 19:42:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 101 transitions, 589 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-10-14 19:42:37,676 INFO L231 Difference]: Finished difference. Result has 121 places, 97 transitions, 439 flow [2024-10-14 19:42:37,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=439, PETRI_PLACES=121, PETRI_TRANSITIONS=97} [2024-10-14 19:42:37,677 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 29 predicate places. [2024-10-14 19:42:37,677 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 97 transitions, 439 flow [2024-10-14 19:42:37,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:37,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:37,677 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-10-14 19:42:37,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-14 19:42:37,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:37,881 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:37,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1726033497, now seen corresponding path program 2 times [2024-10-14 19:42:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588792315] [2024-10-14 19:42:37,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:42:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:37,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:37,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-14 19:42:38,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:42:38,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:42:38,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:42:38,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:38,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:42:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:38,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:38,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588792315] [2024-10-14 19:42:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588792315] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:42:38,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:42:38,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-10-14 19:42:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205914951] [2024-10-14 19:42:38,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:42:38,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:42:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:42:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:42:38,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-14 19:42:38,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 97 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:38,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:38,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-14 19:42:38,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:39,352 INFO L124 PetriNetUnfolderBase]: 484/1143 cut-off events. [2024-10-14 19:42:39,352 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-10-14 19:42:39,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 1143 events. 484/1143 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5208 event pairs, 368 based on Foata normal form. 12/1068 useless extension candidates. Maximal degree in co-relation 2052. Up to 755 conditions per place. [2024-10-14 19:42:39,357 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 89 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-10-14 19:42:39,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1107 flow [2024-10-14 19:42:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:42:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:42:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 740 transitions. [2024-10-14 19:42:39,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-10-14 19:42:39,359 INFO L175 Difference]: Start difference. First operand has 121 places, 97 transitions, 439 flow. Second operand 12 states and 740 transitions. [2024-10-14 19:42:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1107 flow [2024-10-14 19:42:39,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 965 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-14 19:42:39,363 INFO L231 Difference]: Finished difference. Result has 129 places, 110 transitions, 621 flow [2024-10-14 19:42:39,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=621, PETRI_PLACES=129, PETRI_TRANSITIONS=110} [2024-10-14 19:42:39,363 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 37 predicate places. [2024-10-14 19:42:39,363 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 110 transitions, 621 flow [2024-10-14 19:42:39,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:39,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:39,364 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-10-14 19:42:39,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-14 19:42:39,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:39,565 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:39,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash -177148857, now seen corresponding path program 3 times [2024-10-14 19:42:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:39,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124761703] [2024-10-14 19:42:39,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:42:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:39,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:39,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-14 19:42:46,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-10-14 19:42:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:42:46,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:42:46,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:42:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:46,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:42:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:42:47,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:42:47,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124761703] [2024-10-14 19:42:47,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124761703] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:42:47,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:42:47,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-14 19:42:47,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95174142] [2024-10-14 19:42:47,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:42:47,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 19:42:47,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:42:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 19:42:47,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2024-10-14 19:42:47,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-14 19:42:47,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 110 transitions, 621 flow. Second operand has 24 states, 24 states have (on average 58.458333333333336) internal successors, (1403), 24 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:47,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:42:47,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-14 19:42:47,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:42:49,725 INFO L124 PetriNetUnfolderBase]: 484/1383 cut-off events. [2024-10-14 19:42:49,725 INFO L125 PetriNetUnfolderBase]: For 1714/1714 co-relation queries the response was YES. [2024-10-14 19:42:49,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 1383 events. 484/1383 cut-off events. For 1714/1714 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5242 event pairs, 368 based on Foata normal form. 24/1320 useless extension candidates. Maximal degree in co-relation 2417. Up to 755 conditions per place. [2024-10-14 19:42:49,734 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 149 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-10-14 19:42:49,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 233 transitions, 1977 flow [2024-10-14 19:42:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 19:42:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-14 19:42:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1454 transitions. [2024-10-14 19:42:49,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6445035460992907 [2024-10-14 19:42:49,738 INFO L175 Difference]: Start difference. First operand has 129 places, 110 transitions, 621 flow. Second operand 24 states and 1454 transitions. [2024-10-14 19:42:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 233 transitions, 1977 flow [2024-10-14 19:42:49,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 233 transitions, 1965 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:42:49,745 INFO L231 Difference]: Finished difference. Result has 162 places, 135 transitions, 1153 flow [2024-10-14 19:42:49,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1153, PETRI_PLACES=162, PETRI_TRANSITIONS=135} [2024-10-14 19:42:49,746 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 70 predicate places. [2024-10-14 19:42:49,746 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 135 transitions, 1153 flow [2024-10-14 19:42:49,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 58.458333333333336) internal successors, (1403), 24 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:42:49,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:42:49,747 INFO L204 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2024-10-14 19:42:49,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-14 19:42:49,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:49,951 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-14 19:42:49,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:42:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash 76052871, now seen corresponding path program 4 times [2024-10-14 19:42:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:42:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369377749] [2024-10-14 19:42:49,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 19:42:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:42:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:42:49,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:42:49,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process