./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:50:40,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:50:40,802 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:50:40,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:50:40,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:50:40,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:50:40,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:50:40,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:50:40,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:50:40,826 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:50:40,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:50:40,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:50:40,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:50:40,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:50:40,827 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:50:40,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:50:40,828 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:50:40,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:50:40,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:50:40,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:50:40,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:50:40,833 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:50:40,834 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:50:40,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:50:40,834 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:50:40,834 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:50:40,834 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:50:40,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:50:40,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:50:40,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:50:40,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:50:40,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:50:40,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:50:40,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:40,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:50:40,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:50:40,836 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:50:40,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:50:40,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:50:40,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:50:40,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:50:40,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:50:40,839 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-11 19:50:41,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:50:41,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:50:41,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:50:41,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:50:41,119 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:50:41,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 19:50:42,581 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:50:42,754 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:50:42,755 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 19:50:42,762 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/255d9ab95/76897f3d35d242e1a9062bd67645ff50/FLAGbd64cfe27 [2024-10-11 19:50:42,775 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/255d9ab95/76897f3d35d242e1a9062bd67645ff50 [2024-10-11 19:50:42,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:50:42,779 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:50:42,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:42,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:50:42,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:50:42,788 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:42" (1/1) ... [2024-10-11 19:50:42,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4721fd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:42, skipping insertion in model container [2024-10-11 19:50:42,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:42" (1/1) ... [2024-10-11 19:50:42,815 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:42,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:43,006 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) [2024-10-11 19:50:43,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@509627a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:43, skipping insertion in model container [2024-10-11 19:50:43,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:43,007 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:50:43,008 INFO L158 Benchmark]: Toolchain (without parser) took 229.05ms. Allocated memory is still 144.7MB. Free memory was 74.7MB in the beginning and 63.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:50:43,009 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:50:43,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.00ms. Allocated memory is still 144.7MB. Free memory was 74.4MB in the beginning and 63.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:50:43,010 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.00ms. Allocated memory is still 144.7MB. Free memory was 74.4MB in the beginning and 63.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:50:45,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:50:45,135 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:50:45,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:50:45,143 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:50:45,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:50:45,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:50:45,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:50:45,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:50:45,183 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:50:45,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:50:45,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:50:45,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:50:45,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:50:45,187 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:50:45,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:50:45,187 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:50:45,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:50:45,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:50:45,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:50:45,189 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:50:45,193 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:50:45,193 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:50:45,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:50:45,194 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:50:45,194 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:50:45,194 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:50:45,195 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:50:45,195 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:50:45,195 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:50:45,195 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:50:45,195 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:50:45,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:50:45,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:50:45,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:50:45,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:45,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:50:45,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:50:45,197 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:50:45,197 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:50:45,197 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:50:45,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:50:45,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:50:45,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:50:45,198 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:50:45,198 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-11 19:50:45,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:50:45,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:50:45,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:50:45,533 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:50:45,533 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:50:45,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 19:50:46,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:50:47,200 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:50:47,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 19:50:47,208 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/efe4ac30b/1dc5734c4b994d4387bd00eac7a2abb4/FLAGb662d6719 [2024-10-11 19:50:47,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/efe4ac30b/1dc5734c4b994d4387bd00eac7a2abb4 [2024-10-11 19:50:47,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:50:47,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:50:47,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:47,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:50:47,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:50:47,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:47,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6379bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47, skipping insertion in model container [2024-10-11 19:50:47,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:47,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:47,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:47,821 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:50:47,825 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:47,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:47,865 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:50:47,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:47,922 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:50:47,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47 WrapperNode [2024-10-11 19:50:47,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:47,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:50:47,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:50:47,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:50:47,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:47,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:47,974 INFO L138 Inliner]: procedures = 26, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 189 [2024-10-11 19:50:47,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:50:47,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:50:47,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:50:47,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:50:47,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:47,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,052 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-11 19:50:48,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:50:48,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:50:48,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:50:48,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:50:48,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (1/1) ... [2024-10-11 19:50:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:50:48,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:50:48,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:50:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:50:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:50:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:50:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:50:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 19:50:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:50:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:50:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:50:48,212 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:50:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:50:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:50:48,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:50:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:50:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 19:50:48,215 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:50:48,368 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:50:48,371 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:50:48,924 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:50:48,924 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:50:49,272 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:50:49,272 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 19:50:49,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:50:49 BoogieIcfgContainer [2024-10-11 19:50:49,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:50:49,275 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:50:49,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:50:49,279 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:50:49,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:50:47" (1/3) ... [2024-10-11 19:50:49,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39661f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:50:49, skipping insertion in model container [2024-10-11 19:50:49,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:47" (2/3) ... [2024-10-11 19:50:49,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39661f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:50:49, skipping insertion in model container [2024-10-11 19:50:49,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:50:49" (3/3) ... [2024-10-11 19:50:49,284 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-11 19:50:49,304 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:50:49,305 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-11 19:50:49,305 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:50:49,381 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:50:49,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-10-11 19:50:49,466 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-10-11 19:50:49,466 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:50:49,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-10-11 19:50:49,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-10-11 19:50:49,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-10-11 19:50:49,487 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:50:49,493 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;@53064fd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:50:49,495 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-11 19:50:49,498 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:50:49,499 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:50:49,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:50:49,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:49,500 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:50:49,500 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:49,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash 631374, now seen corresponding path program 1 times [2024-10-11 19:50:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:49,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208557070] [2024-10-11 19:50:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:49,519 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 [2024-10-11 19:50:49,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:49,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:49,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:49,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:50:49,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:49,678 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 [2024-10-11 19:50:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:49,693 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:49,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:49,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208557070] [2024-10-11 19:50:49,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208557070] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:49,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:49,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:50:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168134296] [2024-10-11 19:50:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:49,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:50:49,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:50:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:50:49,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-11 19:50:49,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-10-11 19:50:49,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:49,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-11 19:50:49,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:50,023 INFO L124 PetriNetUnfolderBase]: 116/323 cut-off events. [2024-10-11 19:50:50,027 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 19:50:50,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 323 events. 116/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1678 event pairs, 68 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 476. Up to 183 conditions per place. [2024-10-11 19:50:50,035 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-11 19:50:50,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-10-11 19:50:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:50:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:50:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-10-11 19:50:50,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-11 19:50:50,053 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-10-11 19:50:50,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-10-11 19:50:50,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:50:50,062 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-10-11 19:50:50,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-10-11 19:50:50,069 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-11 19:50:50,069 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-10-11 19:50:50,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-10-11 19:50:50,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:50,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:50:50,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:50,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:50,275 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:50,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash 631375, now seen corresponding path program 1 times [2024-10-11 19:50:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:50,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965790067] [2024-10-11 19:50:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:50,277 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 [2024-10-11 19:50:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:50,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:50,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:50,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:50,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:50,380 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 8 treesize of output 7 [2024-10-11 19:50:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:50,474 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:50,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965790067] [2024-10-11 19:50:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965790067] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:50,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:50,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:50:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119789775] [2024-10-11 19:50:50,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:50,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:50:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:50:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:50:50,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-11 19:50:50,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-11 19:50:50,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:50,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-11 19:50:50,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:50,996 INFO L124 PetriNetUnfolderBase]: 118/329 cut-off events. [2024-10-11 19:50:50,997 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:50:50,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 329 events. 118/329 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1699 event pairs, 68 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 501. Up to 192 conditions per place. [2024-10-11 19:50:51,000 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-11 19:50:51,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 196 flow [2024-10-11 19:50:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:50:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:50:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-10-11 19:50:51,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-11 19:50:51,005 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 156 transitions. [2024-10-11 19:50:51,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 196 flow [2024-10-11 19:50:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:50:51,007 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 166 flow [2024-10-11 19:50:51,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-11 19:50:51,008 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-10-11 19:50:51,008 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 166 flow [2024-10-11 19:50:51,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-11 19:50:51,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:51,009 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:50:51,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:50:51,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:51,212 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:51,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 606771554, now seen corresponding path program 1 times [2024-10-11 19:50:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721788252] [2024-10-11 19:50:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:51,213 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 [2024-10-11 19:50:51,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:51,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:51,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:51,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:50:51,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:51,290 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 8 treesize of output 7 [2024-10-11 19:50:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:51,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:51,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721788252] [2024-10-11 19:50:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721788252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:51,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:50:51,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688030578] [2024-10-11 19:50:51,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:51,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:50:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:50:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:50:52,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-11 19:50:52,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 166 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2024-10-11 19:50:52,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:52,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-11 19:50:52,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:53,683 INFO L124 PetriNetUnfolderBase]: 124/347 cut-off events. [2024-10-11 19:50:53,684 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 19:50:53,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 347 events. 124/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1816 event pairs, 68 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 512. Up to 195 conditions per place. [2024-10-11 19:50:53,687 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2024-10-11 19:50:53,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 348 flow [2024-10-11 19:50:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:50:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:50:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 358 transitions. [2024-10-11 19:50:53,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-10-11 19:50:53,691 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 166 flow. Second operand 10 states and 358 transitions. [2024-10-11 19:50:53,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 348 flow [2024-10-11 19:50:53,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:50:53,694 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 328 flow [2024-10-11 19:50:53,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-10-11 19:50:53,695 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-11 19:50:53,695 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 328 flow [2024-10-11 19:50:53,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2024-10-11 19:50:53,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:53,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:53,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:53,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:53,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:53,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:53,900 INFO L85 PathProgramCache]: Analyzing trace with hash -974384368, now seen corresponding path program 1 times [2024-10-11 19:50:53,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:53,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868252501] [2024-10-11 19:50:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:53,900 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 [2024-10-11 19:50:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:53,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:53,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:53,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:53,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:54,041 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:54,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:54,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868252501] [2024-10-11 19:50:54,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868252501] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:54,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:54,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:50:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414583839] [2024-10-11 19:50:54,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:54,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:54,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:50:54,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:54,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:54,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:50:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:54,339 INFO L124 PetriNetUnfolderBase]: 218/579 cut-off events. [2024-10-11 19:50:54,339 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-10-11 19:50:54,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 579 events. 218/579 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3371 event pairs, 87 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1021. Up to 241 conditions per place. [2024-10-11 19:50:54,344 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 87 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-11 19:50:54,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 667 flow [2024-10-11 19:50:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-10-11 19:50:54,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-10-11 19:50:54,346 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 328 flow. Second operand 5 states and 214 transitions. [2024-10-11 19:50:54,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 667 flow [2024-10-11 19:50:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 573 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-11 19:50:54,353 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 281 flow [2024-10-11 19:50:54,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2024-10-11 19:50:54,354 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-11 19:50:54,354 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 281 flow [2024-10-11 19:50:54,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:54,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:54,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:54,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:54,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:54,556 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:54,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash -87652238, now seen corresponding path program 1 times [2024-10-11 19:50:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:54,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098511002] [2024-10-11 19:50:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:54,557 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 [2024-10-11 19:50:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:54,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:54,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:54,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:54,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:54,701 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:54,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098511002] [2024-10-11 19:50:54,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098511002] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:54,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:54,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:50:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855909778] [2024-10-11 19:50:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:54,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:54,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:54,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:54,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:50:54,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-11 19:50:54,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:54,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:50:54,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:55,039 INFO L124 PetriNetUnfolderBase]: 188/483 cut-off events. [2024-10-11 19:50:55,039 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-11 19:50:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 483 events. 188/483 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2567 event pairs, 91 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 888. Up to 239 conditions per place. [2024-10-11 19:50:55,043 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 80 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-10-11 19:50:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 564 flow [2024-10-11 19:50:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-10-11 19:50:55,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-10-11 19:50:55,045 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 281 flow. Second operand 5 states and 207 transitions. [2024-10-11 19:50:55,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 564 flow [2024-10-11 19:50:55,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 560 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:50:55,052 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-10-11 19:50:55,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-11 19:50:55,054 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-10-11 19:50:55,056 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-10-11 19:50:55,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-11 19:50:55,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:55,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:55,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:50:55,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,257 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:55,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1942309027, now seen corresponding path program 1 times [2024-10-11 19:50:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434010732] [2024-10-11 19:50:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:55,259 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 [2024-10-11 19:50:55,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:55,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:55,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:55,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:55,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:55,392 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:55,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434010732] [2024-10-11 19:50:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434010732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:55,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:55,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:50:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624443851] [2024-10-11 19:50:55,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:55,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:55,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:50:55,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-11 19:50:55,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:55,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:50:55,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:55,679 INFO L124 PetriNetUnfolderBase]: 300/779 cut-off events. [2024-10-11 19:50:55,679 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-11 19:50:55,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 779 events. 300/779 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4703 event pairs, 132 based on Foata normal form. 12/616 useless extension candidates. Maximal degree in co-relation 1524. Up to 338 conditions per place. [2024-10-11 19:50:55,684 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-10-11 19:50:55,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 535 flow [2024-10-11 19:50:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-10-11 19:50:55,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-10-11 19:50:55,686 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 5 states and 211 transitions. [2024-10-11 19:50:55,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 535 flow [2024-10-11 19:50:55,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 522 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:55,690 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 320 flow [2024-10-11 19:50:55,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-10-11 19:50:55,691 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-11 19:50:55,691 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 320 flow [2024-10-11 19:50:55,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-11 19:50:55,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:55,691 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:55,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,892 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:55,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1758943930, now seen corresponding path program 1 times [2024-10-11 19:50:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:55,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827310448] [2024-10-11 19:50:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:55,893 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 [2024-10-11 19:50:55,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:55,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:55,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:55,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:55,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:56,022 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:56,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827310448] [2024-10-11 19:50:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827310448] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:56,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:56,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:50:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139458409] [2024-10-11 19:50:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:56,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:56,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:50:56,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-11 19:50:56,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:56,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:50:56,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:56,280 INFO L124 PetriNetUnfolderBase]: 270/685 cut-off events. [2024-10-11 19:50:56,280 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-10-11 19:50:56,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 685 events. 270/685 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3815 event pairs, 142 based on Foata normal form. 9/557 useless extension candidates. Maximal degree in co-relation 1446. Up to 336 conditions per place. [2024-10-11 19:50:56,285 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 65 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-10-11 19:50:56,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 531 flow [2024-10-11 19:50:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-10-11 19:50:56,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-11 19:50:56,287 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 320 flow. Second operand 5 states and 204 transitions. [2024-10-11 19:50:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 531 flow [2024-10-11 19:50:56,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:50:56,291 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 353 flow [2024-10-11 19:50:56,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-10-11 19:50:56,291 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-10-11 19:50:56,292 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 353 flow [2024-10-11 19:50:56,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-11 19:50:56,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:56,292 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:56,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:56,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:56,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:56,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -219840755, now seen corresponding path program 1 times [2024-10-11 19:50:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:56,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849890982] [2024-10-11 19:50:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:56,497 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 [2024-10-11 19:50:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:56,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:56,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:50:56,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:56,595 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 [2024-10-11 19:50:56,635 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 19:50:56,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-11 19:50:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:56,659 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:56,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849890982] [2024-10-11 19:50:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849890982] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:56,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:56,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:50:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110138287] [2024-10-11 19:50:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:56,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:50:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:50:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:50:56,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-11 19:50:56,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-11 19:50:56,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:56,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-11 19:50:56,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:56,938 INFO L124 PetriNetUnfolderBase]: 314/759 cut-off events. [2024-10-11 19:50:56,938 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-10-11 19:50:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 759 events. 314/759 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4229 event pairs, 244 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 1677. Up to 556 conditions per place. [2024-10-11 19:50:56,942 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 48 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-11 19:50:56,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 463 flow [2024-10-11 19:50:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-10-11 19:50:56,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-10-11 19:50:56,945 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 353 flow. Second operand 5 states and 148 transitions. [2024-10-11 19:50:56,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 463 flow [2024-10-11 19:50:56,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:50:56,948 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 354 flow [2024-10-11 19:50:56,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-11 19:50:56,952 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-10-11 19:50:56,953 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 354 flow [2024-10-11 19:50:56,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-11 19:50:56,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:56,954 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:56,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Forceful destruction successful, exit code 0 [2024-10-11 19:50:57,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:57,154 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:50:57,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash -219840754, now seen corresponding path program 1 times [2024-10-11 19:50:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:57,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846598229] [2024-10-11 19:50:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:57,156 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 [2024-10-11 19:50:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:57,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:57,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:57,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:50:57,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:57,274 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 [2024-10-11 19:50:57,283 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 8 treesize of output 7 [2024-10-11 19:50:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:57,417 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 16 treesize of output 11 [2024-10-11 19:50:57,429 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:57,429 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 [2024-10-11 19:50:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:57,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:58,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:58,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846598229] [2024-10-11 19:50:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846598229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:58,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:50:58,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636071588] [2024-10-11 19:50:58,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:58,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:50:58,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:50:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:50:59,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:50:59,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 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) [2024-10-11 19:50:59,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:59,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:50:59,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:01,931 INFO L124 PetriNetUnfolderBase]: 1000/2302 cut-off events. [2024-10-11 19:51:01,931 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-10-11 19:51:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 2302 events. 1000/2302 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16331 event pairs, 336 based on Foata normal form. 0/1853 useless extension candidates. Maximal degree in co-relation 3609. Up to 450 conditions per place. [2024-10-11 19:51:01,945 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 147 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-10-11 19:51:01,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1258 flow [2024-10-11 19:51:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 19:51:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 19:51:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 745 transitions. [2024-10-11 19:51:01,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398550724637681 [2024-10-11 19:51:01,949 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 354 flow. Second operand 23 states and 745 transitions. [2024-10-11 19:51:01,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1258 flow [2024-10-11 19:51:01,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 220 transitions, 1231 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:51:01,957 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 630 flow [2024-10-11 19:51:01,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=630, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-10-11 19:51:01,958 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-10-11 19:51:01,958 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 630 flow [2024-10-11 19:51:01,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 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) [2024-10-11 19:51:01,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:01,958 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:51:01,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:02,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:02,173 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:02,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash 237333019, now seen corresponding path program 2 times [2024-10-11 19:51:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395830285] [2024-10-11 19:51:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:51:02,175 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 [2024-10-11 19:51:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:02,178 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:02,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:02,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:51:02,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:51:02,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:51:02,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:02,256 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 8 treesize of output 7 [2024-10-11 19:51:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:51:02,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:51:02,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395830285] [2024-10-11 19:51:02,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395830285] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:02,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:02,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:51:02,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150359845] [2024-10-11 19:51:02,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:02,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:51:02,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:51:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:51:04,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-11 19:51:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 630 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-11 19:51:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-11 19:51:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:06,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:51:08,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:51:14,382 INFO L124 PetriNetUnfolderBase]: 821/2103 cut-off events. [2024-10-11 19:51:14,382 INFO L125 PetriNetUnfolderBase]: For 1696/1698 co-relation queries the response was YES. [2024-10-11 19:51:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 2103 events. 821/2103 cut-off events. For 1696/1698 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15533 event pairs, 595 based on Foata normal form. 30/1791 useless extension candidates. Maximal degree in co-relation 3878. Up to 1417 conditions per place. [2024-10-11 19:51:14,391 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 44 selfloop transitions, 103 changer transitions 0/171 dead transitions. [2024-10-11 19:51:14,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1332 flow [2024-10-11 19:51:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:51:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:51:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 760 transitions. [2024-10-11 19:51:14,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-10-11 19:51:14,394 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 630 flow. Second operand 22 states and 760 transitions. [2024-10-11 19:51:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1332 flow [2024-10-11 19:51:14,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1298 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-11 19:51:14,403 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1300 flow [2024-10-11 19:51:14,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1300, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-10-11 19:51:14,405 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-10-11 19:51:14,405 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1300 flow [2024-10-11 19:51:14,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-11 19:51:14,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:14,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:14,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:14,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:14,610 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:14,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871804, now seen corresponding path program 1 times [2024-10-11 19:51:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:14,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917847865] [2024-10-11 19:51:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:14,611 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 [2024-10-11 19:51:14,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:14,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:14,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:14,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:51:14,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:14,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:14,834 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 25 treesize of output 21 [2024-10-11 19:51:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:14,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917847865] [2024-10-11 19:51:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917847865] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:14,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:14,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349239039] [2024-10-11 19:51:14,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:14,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:15,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-11 19:51:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 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) [2024-10-11 19:51:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-11 19:51:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:16,616 INFO L124 PetriNetUnfolderBase]: 1181/2671 cut-off events. [2024-10-11 19:51:16,616 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-10-11 19:51:16,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2671 events. 1181/2671 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18638 event pairs, 380 based on Foata normal form. 0/2405 useless extension candidates. Maximal degree in co-relation 6267. Up to 678 conditions per place. [2024-10-11 19:51:16,633 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 142 selfloop transitions, 49 changer transitions 0/214 dead transitions. [2024-10-11 19:51:16,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 214 transitions, 1797 flow [2024-10-11 19:51:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:51:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:51:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 319 transitions. [2024-10-11 19:51:16,635 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2024-10-11 19:51:16,635 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1300 flow. Second operand 8 states and 319 transitions. [2024-10-11 19:51:16,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 214 transitions, 1797 flow [2024-10-11 19:51:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 214 transitions, 1525 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-11 19:51:16,651 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1173 flow [2024-10-11 19:51:16,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2024-10-11 19:51:16,652 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2024-10-11 19:51:16,653 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1173 flow [2024-10-11 19:51:16,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 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) [2024-10-11 19:51:16,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:16,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:16,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:16,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:16,854 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:16,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871803, now seen corresponding path program 1 times [2024-10-11 19:51:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700406325] [2024-10-11 19:51:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:16,855 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 [2024-10-11 19:51:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:16,856 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:16,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:16,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:51:16,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:16,924 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 [2024-10-11 19:51:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:51:16,944 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:16,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700406325] [2024-10-11 19:51:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700406325] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:51:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570152603] [2024-10-11 19:51:16,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:16,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:51:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:51:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:51:17,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-11 19:51:17,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1173 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-11 19:51:17,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:17,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-11 19:51:17,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:17,434 INFO L124 PetriNetUnfolderBase]: 1398/3040 cut-off events. [2024-10-11 19:51:17,434 INFO L125 PetriNetUnfolderBase]: For 2578/2578 co-relation queries the response was YES. [2024-10-11 19:51:17,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 3040 events. 1398/3040 cut-off events. For 2578/2578 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20925 event pairs, 1086 based on Foata normal form. 82/2976 useless extension candidates. Maximal degree in co-relation 7464. Up to 2370 conditions per place. [2024-10-11 19:51:17,458 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 131 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-10-11 19:51:17,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1467 flow [2024-10-11 19:51:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:51:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:51:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-11 19:51:17,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-11 19:51:17,461 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1173 flow. Second operand 4 states and 125 transitions. [2024-10-11 19:51:17,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1467 flow [2024-10-11 19:51:17,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1418 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:17,475 INFO L231 Difference]: Finished difference. Result has 120 places, 169 transitions, 1156 flow [2024-10-11 19:51:17,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=120, PETRI_TRANSITIONS=169} [2024-10-11 19:51:17,476 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-10-11 19:51:17,476 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 169 transitions, 1156 flow [2024-10-11 19:51:17,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-11 19:51:17,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:17,477 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:17,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:17,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:17,678 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:17,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -820713168, now seen corresponding path program 1 times [2024-10-11 19:51:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:17,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114452859] [2024-10-11 19:51:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:17,680 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 [2024-10-11 19:51:17,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:17,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:17,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:17,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:51:17,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:17,803 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 [2024-10-11 19:51:17,809 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 8 treesize of output 7 [2024-10-11 19:51:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:17,951 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 16 treesize of output 11 [2024-10-11 19:51:17,970 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:17,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:51:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:18,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:18,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114452859] [2024-10-11 19:51:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114452859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:18,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:51:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488910968] [2024-10-11 19:51:18,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:18,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:51:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:51:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:51:20,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-11 19:51:20,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 169 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2024-10-11 19:51:20,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:20,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-11 19:51:20,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:22,688 INFO L124 PetriNetUnfolderBase]: 1684/3709 cut-off events. [2024-10-11 19:51:22,689 INFO L125 PetriNetUnfolderBase]: For 2993/3075 co-relation queries the response was YES. [2024-10-11 19:51:22,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 3709 events. 1684/3709 cut-off events. For 2993/3075 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 27445 event pairs, 676 based on Foata normal form. 0/3264 useless extension candidates. Maximal degree in co-relation 8651. Up to 737 conditions per place. [2024-10-11 19:51:22,708 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 160 selfloop transitions, 110 changer transitions 0/287 dead transitions. [2024-10-11 19:51:22,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 287 transitions, 2227 flow [2024-10-11 19:51:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 19:51:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 19:51:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 756 transitions. [2024-10-11 19:51:22,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-10-11 19:51:22,712 INFO L175 Difference]: Start difference. First operand has 120 places, 169 transitions, 1156 flow. Second operand 23 states and 756 transitions. [2024-10-11 19:51:22,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 287 transitions, 2227 flow [2024-10-11 19:51:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 287 transitions, 2192 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:51:22,728 INFO L231 Difference]: Finished difference. Result has 141 places, 179 transitions, 1414 flow [2024-10-11 19:51:22,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1414, PETRI_PLACES=141, PETRI_TRANSITIONS=179} [2024-10-11 19:51:22,729 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-11 19:51:22,730 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 179 transitions, 1414 flow [2024-10-11 19:51:22,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2024-10-11 19:51:22,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:22,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:22,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:22,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:22,931 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:22,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 327696172, now seen corresponding path program 1 times [2024-10-11 19:51:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190470034] [2024-10-11 19:51:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:22,932 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 [2024-10-11 19:51:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:22,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:22,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:23,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:51:23,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:23,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:23,253 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 25 treesize of output 21 [2024-10-11 19:51:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:23,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190470034] [2024-10-11 19:51:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190470034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:23,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022037229] [2024-10-11 19:51:23,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:23,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:23,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:23,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:23,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 179 transitions, 1414 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-10-11 19:51:23,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:23,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:23,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:24,884 INFO L124 PetriNetUnfolderBase]: 2375/4771 cut-off events. [2024-10-11 19:51:24,884 INFO L125 PetriNetUnfolderBase]: For 4578/4712 co-relation queries the response was YES. [2024-10-11 19:51:24,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12300 conditions, 4771 events. 2375/4771 cut-off events. For 4578/4712 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 34144 event pairs, 709 based on Foata normal form. 0/4651 useless extension candidates. Maximal degree in co-relation 12078. Up to 1480 conditions per place. [2024-10-11 19:51:24,909 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 163 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-10-11 19:51:24,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 233 transitions, 2083 flow [2024-10-11 19:51:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:51:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:51:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-11 19:51:24,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-11 19:51:24,912 INFO L175 Difference]: Start difference. First operand has 141 places, 179 transitions, 1414 flow. Second operand 8 states and 309 transitions. [2024-10-11 19:51:24,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 233 transitions, 2083 flow [2024-10-11 19:51:24,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 1957 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-10-11 19:51:24,928 INFO L231 Difference]: Finished difference. Result has 134 places, 181 transitions, 1433 flow [2024-10-11 19:51:24,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=134, PETRI_TRANSITIONS=181} [2024-10-11 19:51:24,929 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 76 predicate places. [2024-10-11 19:51:24,929 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 181 transitions, 1433 flow [2024-10-11 19:51:24,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-10-11 19:51:24,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:24,929 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:24,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:25,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:25,130 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:25,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -135882540, now seen corresponding path program 1 times [2024-10-11 19:51:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:25,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980516599] [2024-10-11 19:51:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:25,131 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 [2024-10-11 19:51:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:25,134 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:25,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:25,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:51:25,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:25,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:25,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980516599] [2024-10-11 19:51:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980516599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 19:51:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153350890] [2024-10-11 19:51:25,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:25,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:51:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:51:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:51:25,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:51:25,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 181 transitions, 1433 flow. Second operand has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-11 19:51:25,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:25,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:51:25,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:26,585 INFO L124 PetriNetUnfolderBase]: 1826/4126 cut-off events. [2024-10-11 19:51:26,586 INFO L125 PetriNetUnfolderBase]: For 5171/5259 co-relation queries the response was YES. [2024-10-11 19:51:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11183 conditions, 4126 events. 1826/4126 cut-off events. For 5171/5259 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 30860 event pairs, 1145 based on Foata normal form. 24/4080 useless extension candidates. Maximal degree in co-relation 10964. Up to 2317 conditions per place. [2024-10-11 19:51:26,604 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 189 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-10-11 19:51:26,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 282 transitions, 2551 flow [2024-10-11 19:51:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:51:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:51:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 443 transitions. [2024-10-11 19:51:26,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6712121212121213 [2024-10-11 19:51:26,606 INFO L175 Difference]: Start difference. First operand has 134 places, 181 transitions, 1433 flow. Second operand 11 states and 443 transitions. [2024-10-11 19:51:26,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 282 transitions, 2551 flow [2024-10-11 19:51:26,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2444 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 19:51:26,625 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1816 flow [2024-10-11 19:51:26,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1816, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-10-11 19:51:26,626 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-11 19:51:26,626 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1816 flow [2024-10-11 19:51:26,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-11 19:51:26,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:26,627 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:26,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:26,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:26,828 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:26,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -63400330, now seen corresponding path program 1 times [2024-10-11 19:51:26,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:26,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523178662] [2024-10-11 19:51:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:26,829 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 [2024-10-11 19:51:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:26,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:26,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:26,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:51:26,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:27,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:27,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:27,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523178662] [2024-10-11 19:51:27,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523178662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:27,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:27,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 19:51:27,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206891770] [2024-10-11 19:51:27,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:27,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:51:27,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:51:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:51:27,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:51:27,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1816 flow. Second operand has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 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) [2024-10-11 19:51:27,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:27,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:51:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:28,183 INFO L124 PetriNetUnfolderBase]: 1725/3757 cut-off events. [2024-10-11 19:51:28,183 INFO L125 PetriNetUnfolderBase]: For 4647/4739 co-relation queries the response was YES. [2024-10-11 19:51:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 3757 events. 1725/3757 cut-off events. For 4647/4739 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26795 event pairs, 1180 based on Foata normal form. 18/3696 useless extension candidates. Maximal degree in co-relation 10096. Up to 2329 conditions per place. [2024-10-11 19:51:28,201 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 182 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-10-11 19:51:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 274 transitions, 2725 flow [2024-10-11 19:51:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:51:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:51:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 439 transitions. [2024-10-11 19:51:28,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651515151515152 [2024-10-11 19:51:28,203 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1816 flow. Second operand 11 states and 439 transitions. [2024-10-11 19:51:28,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 274 transitions, 2725 flow [2024-10-11 19:51:28,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 2709 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:51:28,220 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 1939 flow [2024-10-11 19:51:28,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-10-11 19:51:28,221 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 90 predicate places. [2024-10-11 19:51:28,221 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 1939 flow [2024-10-11 19:51:28,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 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) [2024-10-11 19:51:28,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:28,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:28,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,422 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:28,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1414938719, now seen corresponding path program 1 times [2024-10-11 19:51:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:28,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285767638] [2024-10-11 19:51:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:28,423 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 [2024-10-11 19:51:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:28,424 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:28,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:28,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:51:28,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:51:28,789 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:28,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285767638] [2024-10-11 19:51:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285767638] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:28,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 19:51:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851404406] [2024-10-11 19:51:28,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:28,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:51:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:51:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:51:28,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-10-11 19:51:28,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-11 19:51:28,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:28,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-10-11 19:51:28,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:29,716 INFO L124 PetriNetUnfolderBase]: 1537/3597 cut-off events. [2024-10-11 19:51:29,716 INFO L125 PetriNetUnfolderBase]: For 4809/4891 co-relation queries the response was YES. [2024-10-11 19:51:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10036 conditions, 3597 events. 1537/3597 cut-off events. For 4809/4891 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 26690 event pairs, 722 based on Foata normal form. 1/3546 useless extension candidates. Maximal degree in co-relation 9775. Up to 2535 conditions per place. [2024-10-11 19:51:29,729 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 173 selfloop transitions, 18 changer transitions 13/227 dead transitions. [2024-10-11 19:51:29,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2524 flow [2024-10-11 19:51:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-10-11 19:51:29,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-10-11 19:51:29,730 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 1939 flow. Second operand 6 states and 242 transitions. [2024-10-11 19:51:29,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2524 flow [2024-10-11 19:51:29,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:51:29,747 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2003 flow [2024-10-11 19:51:29,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2003, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-10-11 19:51:29,748 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-10-11 19:51:29,748 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2003 flow [2024-10-11 19:51:29,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-11 19:51:29,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:29,749 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:29,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:29,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:29,950 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:29,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:29,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089671, now seen corresponding path program 2 times [2024-10-11 19:51:29,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:29,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044958493] [2024-10-11 19:51:29,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:51:29,951 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 [2024-10-11 19:51:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:29,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:29,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:51:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:51:30,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:51:30,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:30,035 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 [2024-10-11 19:51:30,040 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 8 treesize of output 7 [2024-10-11 19:51:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:30,136 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 16 treesize of output 11 [2024-10-11 19:51:30,145 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:30,145 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 [2024-10-11 19:51:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 19:51:30,220 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:30,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:30,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044958493] [2024-10-11 19:51:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044958493] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:30,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:30,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:51:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688948357] [2024-10-11 19:51:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:30,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:51:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:51:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:51:30,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:51:30,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2003 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:51:30,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:30,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:51:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:31,229 INFO L124 PetriNetUnfolderBase]: 2717/5452 cut-off events. [2024-10-11 19:51:31,230 INFO L125 PetriNetUnfolderBase]: For 8218/8327 co-relation queries the response was YES. [2024-10-11 19:51:31,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15469 conditions, 5452 events. 2717/5452 cut-off events. For 8218/8327 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 39156 event pairs, 1138 based on Foata normal form. 32/5462 useless extension candidates. Maximal degree in co-relation 15268. Up to 2187 conditions per place. [2024-10-11 19:51:31,259 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 218 selfloop transitions, 35 changer transitions 0/265 dead transitions. [2024-10-11 19:51:31,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 265 transitions, 2783 flow [2024-10-11 19:51:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-10-11 19:51:31,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-11 19:51:31,260 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2003 flow. Second operand 6 states and 213 transitions. [2024-10-11 19:51:31,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 265 transitions, 2783 flow [2024-10-11 19:51:31,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 2749 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-11 19:51:31,284 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2113 flow [2024-10-11 19:51:31,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2113, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-10-11 19:51:31,285 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-10-11 19:51:31,285 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2113 flow [2024-10-11 19:51:31,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:51:31,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:31,285 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:31,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Forceful destruction successful, exit code 0 [2024-10-11 19:51:31,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:31,486 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:31,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 184978279, now seen corresponding path program 2 times [2024-10-11 19:51:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476360829] [2024-10-11 19:51:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:51:31,487 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 [2024-10-11 19:51:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:31,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:31,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:31,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:51:31,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:51:31,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:51:31,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:31,593 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 [2024-10-11 19:51:31,602 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 8 treesize of output 1 [2024-10-11 19:51:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:31,672 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 [2024-10-11 19:51:31,682 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:31,682 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 [2024-10-11 19:51:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:31,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:51:32,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:32,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476360829] [2024-10-11 19:51:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476360829] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:32,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:51:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429902680] [2024-10-11 19:51:32,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:32,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:51:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:51:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:51:34,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:39,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:43,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:47,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:52,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:52,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-11 19:51:52,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2113 flow. Second operand has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 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) [2024-10-11 19:51:52,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:52,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-11 19:51:52,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:54,499 INFO L124 PetriNetUnfolderBase]: 3232/6538 cut-off events. [2024-10-11 19:51:54,500 INFO L125 PetriNetUnfolderBase]: For 12334/12566 co-relation queries the response was YES. [2024-10-11 19:51:54,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 6538 events. 3232/6538 cut-off events. For 12334/12566 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 49079 event pairs, 869 based on Foata normal form. 62/6465 useless extension candidates. Maximal degree in co-relation 18666. Up to 1617 conditions per place. [2024-10-11 19:51:54,535 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 236 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-10-11 19:51:54,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 323 transitions, 3249 flow [2024-10-11 19:51:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:51:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:51:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 427 transitions. [2024-10-11 19:51:54,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5474358974358975 [2024-10-11 19:51:54,537 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2113 flow. Second operand 13 states and 427 transitions. [2024-10-11 19:51:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 323 transitions, 3249 flow [2024-10-11 19:51:54,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 323 transitions, 3191 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:54,563 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 2372 flow [2024-10-11 19:51:54,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2372, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2024-10-11 19:51:54,564 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-10-11 19:51:54,564 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 2372 flow [2024-10-11 19:51:54,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 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) [2024-10-11 19:51:54,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:54,564 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:54,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:54,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:54,765 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:51:54,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1439359939, now seen corresponding path program 1 times [2024-10-11 19:51:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689971424] [2024-10-11 19:51:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:54,766 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 [2024-10-11 19:51:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:54,767 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (21)] Waiting until timeout for monitored process [2024-10-11 19:51:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:54,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:51:54,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:54,869 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 8 treesize of output 7 [2024-10-11 19:51:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:51:55,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:51:55,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:55,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689971424] [2024-10-11 19:51:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689971424] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:55,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:55,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 19:51:55,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140569431] [2024-10-11 19:51:55,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:55,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:51:55,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:55,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:51:55,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:51:56,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:51:56,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 2372 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-10-11 19:51:56,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:56,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:51:56,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:59,742 INFO L124 PetriNetUnfolderBase]: 5522/10738 cut-off events. [2024-10-11 19:51:59,742 INFO L125 PetriNetUnfolderBase]: For 16269/16289 co-relation queries the response was YES. [2024-10-11 19:51:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31105 conditions, 10738 events. 5522/10738 cut-off events. For 16269/16289 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 79389 event pairs, 732 based on Foata normal form. 212/10915 useless extension candidates. Maximal degree in co-relation 30845. Up to 2265 conditions per place. [2024-10-11 19:51:59,795 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 324 selfloop transitions, 72 changer transitions 0/418 dead transitions. [2024-10-11 19:51:59,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 418 transitions, 4065 flow [2024-10-11 19:51:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:51:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:51:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 489 transitions. [2024-10-11 19:51:59,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-10-11 19:51:59,798 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 2372 flow. Second operand 12 states and 489 transitions. [2024-10-11 19:51:59,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 418 transitions, 4065 flow [2024-10-11 19:51:59,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 418 transitions, 3992 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-11 19:51:59,828 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2615 flow [2024-10-11 19:51:59,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2615, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-10-11 19:51:59,828 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 115 predicate places. [2024-10-11 19:51:59,828 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2615 flow [2024-10-11 19:51:59,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-10-11 19:51:59,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:59,829 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:59,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (21)] Forceful destruction successful, exit code 0 [2024-10-11 19:52:00,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:00,029 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:52:00,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash -558632727, now seen corresponding path program 2 times [2024-10-11 19:52:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910345619] [2024-10-11 19:52:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:52:00,031 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 [2024-10-11 19:52:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:00,032 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:00,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (22)] Waiting until timeout for monitored process [2024-10-11 19:52:00,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:52:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:00,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:52:00,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:00,121 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 [2024-10-11 19:52:00,127 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 8 treesize of output 7 [2024-10-11 19:52:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:52:00,246 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 16 treesize of output 11 [2024-10-11 19:52:00,261 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:52:00,261 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 [2024-10-11 19:52:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 19:52:00,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:52:00,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:00,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910345619] [2024-10-11 19:52:00,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910345619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:00,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:00,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:00,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387405458] [2024-10-11 19:52:00,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:00,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:52:00,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:52:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:52:00,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:52:00,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2615 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 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) [2024-10-11 19:52:00,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:00,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:52:00,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:02,297 INFO L124 PetriNetUnfolderBase]: 6353/12498 cut-off events. [2024-10-11 19:52:02,297 INFO L125 PetriNetUnfolderBase]: For 27684/27816 co-relation queries the response was YES. [2024-10-11 19:52:02,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 12498 events. 6353/12498 cut-off events. For 27684/27816 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 98416 event pairs, 2885 based on Foata normal form. 83/12426 useless extension candidates. Maximal degree in co-relation 38206. Up to 5637 conditions per place. [2024-10-11 19:52:02,430 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 248 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2024-10-11 19:52:02,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 308 transitions, 3719 flow [2024-10-11 19:52:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:52:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:52:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-10-11 19:52:02,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-11 19:52:02,432 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2615 flow. Second operand 6 states and 210 transitions. [2024-10-11 19:52:02,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 308 transitions, 3719 flow [2024-10-11 19:52:02,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 308 transitions, 3642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-11 19:52:02,480 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2719 flow [2024-10-11 19:52:02,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2719, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-10-11 19:52:02,480 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 119 predicate places. [2024-10-11 19:52:02,481 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2719 flow [2024-10-11 19:52:02,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 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) [2024-10-11 19:52:02,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:02,481 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:02,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (22)] Forceful destruction successful, exit code 0 [2024-10-11 19:52:02,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:02,689 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:52:02,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -953798583, now seen corresponding path program 2 times [2024-10-11 19:52:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292416701] [2024-10-11 19:52:02,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:52:02,691 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 [2024-10-11 19:52:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:02,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (23)] Waiting until timeout for monitored process [2024-10-11 19:52:02,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:52:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:02,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:52:02,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:02,800 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 [2024-10-11 19:52:02,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:52:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:52:02,863 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 16 treesize of output 11 [2024-10-11 19:52:02,870 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:52:02,871 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 [2024-10-11 19:52:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:52:03,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:52:03,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292416701] [2024-10-11 19:52:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292416701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:03,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:52:03,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:52:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286490919] [2024-10-11 19:52:03,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:03,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:52:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:52:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:52:05,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:52:05,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2719 flow. Second operand has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:05,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:05,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:52:05,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:09,671 INFO L124 PetriNetUnfolderBase]: 11865/23498 cut-off events. [2024-10-11 19:52:09,671 INFO L125 PetriNetUnfolderBase]: For 57225/57631 co-relation queries the response was YES. [2024-10-11 19:52:09,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73190 conditions, 23498 events. 11865/23498 cut-off events. For 57225/57631 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 202039 event pairs, 1936 based on Foata normal form. 607/23913 useless extension candidates. Maximal degree in co-relation 72920. Up to 3760 conditions per place. [2024-10-11 19:52:09,939 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 415 selfloop transitions, 50 changer transitions 0/488 dead transitions. [2024-10-11 19:52:09,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 488 transitions, 5625 flow [2024-10-11 19:52:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:52:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:52:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 449 transitions. [2024-10-11 19:52:09,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6236111111111111 [2024-10-11 19:52:09,941 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2719 flow. Second operand 12 states and 449 transitions. [2024-10-11 19:52:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 488 transitions, 5625 flow [2024-10-11 19:52:10,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 488 transitions, 5551 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-11 19:52:10,046 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 2907 flow [2024-10-11 19:52:10,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2907, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-10-11 19:52:10,047 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-10-11 19:52:10,047 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 2907 flow [2024-10-11 19:52:10,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:10,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:10,047 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:10,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (23)] Ended with exit code 0 [2024-10-11 19:52:10,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:10,248 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:52:10,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash 524540466, now seen corresponding path program 1 times [2024-10-11 19:52:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:10,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287644786] [2024-10-11 19:52:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:10,248 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 [2024-10-11 19:52:10,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:10,250 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:10,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (24)] Waiting until timeout for monitored process [2024-10-11 19:52:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:10,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:52:10,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:10,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:11,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287644786] [2024-10-11 19:52:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287644786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:11,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:52:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-10-11 19:52:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229215843] [2024-10-11 19:52:11,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:11,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 19:52:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 19:52:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-10-11 19:52:11,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-11 19:52:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 2907 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 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) [2024-10-11 19:52:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-11 19:52:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand