./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/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:19:29,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:19:29,186 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:19:29,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:19:29,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:19:29,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:19:29,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:19:29,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:19:29,227 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:19:29,228 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:19:29,228 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:19:29,229 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:19:29,230 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:19:29,231 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:19:29,231 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:19:29,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:19:29,232 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:19:29,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:19:29,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:19:29,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:19:29,233 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:19:29,234 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:19:29,234 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:19:29,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:19:29,235 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:19:29,235 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:19:29,235 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:19:29,236 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:19:29,236 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:19:29,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:19:29,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:19:29,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:19:29,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:19:29,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:19:29,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:19:29,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:19:29,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:19:29,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:19:29,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:19:29,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:19:29,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:19:29,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:19:29,241 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-10-24 19:19:29,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:19:29,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:19:29,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:19:29,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:19:29,587 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:19:29,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-24 19:19:31,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:19:31,337 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:19:31,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-24 19:19:31,350 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91a924a0/b64b9a2cd7b14f6292d417f2d1eac44c/FLAG091fb0546 [2024-10-24 19:19:31,712 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91a924a0/b64b9a2cd7b14f6292d417f2d1eac44c [2024-10-24 19:19:31,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:19:31,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:19:31,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:19:31,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:19:31,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:19:31,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:19:31" (1/1) ... [2024-10-24 19:19:31,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b65057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:31, skipping insertion in model container [2024-10-24 19:19:31,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:19:31" (1/1) ... [2024-10-24 19:19:31,761 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:19:32,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:19:32,063 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) [2024-10-24 19:19:32,064 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6621cf90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:32, skipping insertion in model container [2024-10-24 19:19:32,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:19:32,064 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:19:32,066 INFO L158 Benchmark]: Toolchain (without parser) took 349.02ms. Allocated memory is still 167.8MB. Free memory was 136.3MB in the beginning and 124.2MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:19:32,067 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:19:32,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.80ms. Allocated memory is still 167.8MB. Free memory was 136.3MB in the beginning and 124.2MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:19:32,069 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.80ms. Allocated memory is still 167.8MB. Free memory was 136.3MB in the beginning and 124.2MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:19:34,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:19:34,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:19:34,393 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:19:34,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:19:34,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:19:34,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:19:34,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:19:34,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:19:34,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:19:34,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:19:34,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:19:34,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:19:34,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:19:34,434 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:19:34,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:19:34,435 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:19:34,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:19:34,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:19:34,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:19:34,436 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:19:34,440 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:19:34,441 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:19:34,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:19:34,441 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:19:34,441 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:19:34,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:19:34,442 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:19:34,442 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:19:34,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:19:34,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:19:34,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:19:34,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:19:34,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:19:34,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:19:34,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:19:34,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:19:34,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:19:34,454 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:19:34,454 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:19:34,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:19:34,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:19:34,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:19:34,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:19:34,455 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:19:34,455 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-10-24 19:19:34,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:19:34,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:19:34,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:19:34,809 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:19:34,809 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:19:34,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-24 19:19:36,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:19:36,766 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:19:36,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-24 19:19:36,780 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9c2ec51c/c32865d17bbf4e9b9dee8e27a6872164/FLAG5cbf115a8 [2024-10-24 19:19:36,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9c2ec51c/c32865d17bbf4e9b9dee8e27a6872164 [2024-10-24 19:19:36,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:19:36,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:19:36,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:19:36,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:19:36,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:19:36,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:19:36" (1/1) ... [2024-10-24 19:19:36,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6631ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:36, skipping insertion in model container [2024-10-24 19:19:36,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:19:36" (1/1) ... [2024-10-24 19:19:36,843 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:19:37,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:19:37,164 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:19:37,172 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:19:37,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:19:37,213 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:19:37,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:19:37,285 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:19:37,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37 WrapperNode [2024-10-24 19:19:37,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:19:37,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:19:37,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:19:37,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:19:37,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,358 INFO L138 Inliner]: procedures = 27, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 300 [2024-10-24 19:19:37,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:19:37,360 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:19:37,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:19:37,361 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:19:37,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,380 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,416 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-10-24 19:19:37,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,421 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:19:37,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:19:37,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:19:37,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:19:37,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (1/1) ... [2024-10-24 19:19:37,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:19:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:19:37,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:19:37,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:19:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:19:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:19:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:19:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:19:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:19:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:19:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-24 19:19:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-24 19:19:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:19:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:19:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:19:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:19:37,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:19:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:19:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:19:37,558 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:19:37,688 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:19:37,691 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:19:38,396 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:19:38,398 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:19:38,892 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:19:38,893 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 19:19:38,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:19:38 BoogieIcfgContainer [2024-10-24 19:19:38,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:19:38,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:19:38,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:19:38,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:19:38,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:19:36" (1/3) ... [2024-10-24 19:19:38,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a6df6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:19:38, skipping insertion in model container [2024-10-24 19:19:38,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:19:37" (2/3) ... [2024-10-24 19:19:38,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a6df6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:19:38, skipping insertion in model container [2024-10-24 19:19:38,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:19:38" (3/3) ... [2024-10-24 19:19:38,904 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-10-24 19:19:38,923 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:19:38,923 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-24 19:19:38,923 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:19:39,005 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 19:19:39,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2024-10-24 19:19:39,083 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2024-10-24 19:19:39,083 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:19:39,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 147 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-10-24 19:19:39,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2024-10-24 19:19:39,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2024-10-24 19:19:39,105 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:19:39,112 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;@36b0ff89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:19:39,113 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-10-24 19:19:39,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:19:39,118 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:19:39,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:19:39,119 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:39,119 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:19:39,120 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:39,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 866650, now seen corresponding path program 1 times [2024-10-24 19:19:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98089765] [2024-10-24 19:19:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:39,150 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 [2024-10-24 19:19:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:39,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:39,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:19:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:39,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:19:39,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:39,304 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 [2024-10-24 19:19:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:39,324 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:19:39,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:39,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98089765] [2024-10-24 19:19:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98089765] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:19:39,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:19:39,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:19:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713132191] [2024-10-24 19:19:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:19:39,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:19:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:19:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:19:39,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:19:39,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-10-24 19:19:39,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:39,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:19:39,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:41,665 INFO L124 PetriNetUnfolderBase]: 9651/13134 cut-off events. [2024-10-24 19:19:41,665 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-10-24 19:19:41,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 13134 events. 9651/13134 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 82617 event pairs, 6408 based on Foata normal form. 1/7299 useless extension candidates. Maximal degree in co-relation 24078. Up to 11896 conditions per place. [2024-10-24 19:19:41,855 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-10-24 19:19:41,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 214 flow [2024-10-24 19:19:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:19:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:19:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-10-24 19:19:41,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-10-24 19:19:41,872 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 113 transitions. [2024-10-24 19:19:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 214 flow [2024-10-24 19:19:41,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 19:19:41,902 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2024-10-24 19:19:41,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-10-24 19:19:41,910 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-10-24 19:19:41,910 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2024-10-24 19:19:41,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-10-24 19:19:41,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:41,911 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:19:41,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-24 19:19:42,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:42,112 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:42,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash 866651, now seen corresponding path program 1 times [2024-10-24 19:19:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412243927] [2024-10-24 19:19:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:42,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:42,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:42,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:42,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:19:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:42,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:19:42,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:42,217 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 [2024-10-24 19:19:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:42,302 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:19:42,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412243927] [2024-10-24 19:19:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412243927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:19:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:19:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:19:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83304795] [2024-10-24 19:19:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:19:42,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:19:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:19:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:19:42,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:19:42,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-24 19:19:42,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:42,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:19:42,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:44,502 INFO L124 PetriNetUnfolderBase]: 9653/13140 cut-off events. [2024-10-24 19:19:44,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:19:44,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25278 conditions, 13140 events. 9653/13140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 82455 event pairs, 6408 based on Foata normal form. 0/7302 useless extension candidates. Maximal degree in co-relation 25242. Up to 11905 conditions per place. [2024-10-24 19:19:44,611 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 39 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-10-24 19:19:44,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 232 flow [2024-10-24 19:19:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:19:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:19:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-10-24 19:19:44,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-24 19:19:44,615 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 144 transitions. [2024-10-24 19:19:44,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 232 flow [2024-10-24 19:19:44,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:19:44,622 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 178 flow [2024-10-24 19:19:44,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-10-24 19:19:44,625 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-10-24 19:19:44,625 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 178 flow [2024-10-24 19:19:44,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-24 19:19:44,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:44,626 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:19:44,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:19:44,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:44,827 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:44,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 832880270, now seen corresponding path program 1 times [2024-10-24 19:19:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619560019] [2024-10-24 19:19:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:44,828 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 [2024-10-24 19:19:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:44,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:44,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:19:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:44,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:19:44,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:44,931 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 [2024-10-24 19:19:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:45,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:19:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:45,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:45,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619560019] [2024-10-24 19:19:45,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619560019] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:19:45,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:19:45,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:19:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711016638] [2024-10-24 19:19:45,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:19:45,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:19:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:19:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:19:45,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:19:45,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:19:45,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:45,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:19:45,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:48,032 INFO L124 PetriNetUnfolderBase]: 9659/13158 cut-off events. [2024-10-24 19:19:48,033 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:19:48,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25356 conditions, 13158 events. 9659/13158 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 82550 event pairs, 6408 based on Foata normal form. 0/7318 useless extension candidates. Maximal degree in co-relation 25253. Up to 11908 conditions per place. [2024-10-24 19:19:48,162 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 39 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-10-24 19:19:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 384 flow [2024-10-24 19:19:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:19:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:19:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 310 transitions. [2024-10-24 19:19:48,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-24 19:19:48,170 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 178 flow. Second operand 10 states and 310 transitions. [2024-10-24 19:19:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 384 flow [2024-10-24 19:19:48,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 81 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:19:48,175 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 340 flow [2024-10-24 19:19:48,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=340, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-10-24 19:19:48,177 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2024-10-24 19:19:48,178 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 340 flow [2024-10-24 19:19:48,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:19:48,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:48,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:48,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-24 19:19:48,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:48,383 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:48,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1724412099, now seen corresponding path program 1 times [2024-10-24 19:19:48,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:48,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324793853] [2024-10-24 19:19:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:48,384 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 [2024-10-24 19:19:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:48,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:48,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:19:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:48,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:19:48,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:48,532 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:19:48,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324793853] [2024-10-24 19:19:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324793853] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:19:48,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:19:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:19:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819742505] [2024-10-24 19:19:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:19:48,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:19:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:19:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:19:48,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:19:48,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-10-24 19:19:48,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:48,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:19:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:50,422 INFO L124 PetriNetUnfolderBase]: 10705/14769 cut-off events. [2024-10-24 19:19:50,422 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-24 19:19:50,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28518 conditions, 14769 events. 10705/14769 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 95736 event pairs, 7188 based on Foata normal form. 299/8998 useless extension candidates. Maximal degree in co-relation 28430. Up to 11923 conditions per place. [2024-10-24 19:19:50,594 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 98 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-10-24 19:19:50,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 700 flow [2024-10-24 19:19:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:19:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:19:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-10-24 19:19:50,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-10-24 19:19:50,598 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 340 flow. Second operand 4 states and 178 transitions. [2024-10-24 19:19:50,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 700 flow [2024-10-24 19:19:50,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 606 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-24 19:19:50,605 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 295 flow [2024-10-24 19:19:50,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-10-24 19:19:50,607 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2024-10-24 19:19:50,608 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 295 flow [2024-10-24 19:19:50,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-10-24 19:19:50,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:50,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:50,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:19:50,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:50,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:50,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1238289958, now seen corresponding path program 1 times [2024-10-24 19:19:50,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:50,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892452635] [2024-10-24 19:19:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:50,814 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 [2024-10-24 19:19:50,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:50,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:50,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:19:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:50,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:19:50,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:50,908 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 [2024-10-24 19:19:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:50,946 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:19:50,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892452635] [2024-10-24 19:19:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892452635] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:19:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:19:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:19:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250599498] [2024-10-24 19:19:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:19:50,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:19:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:19:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:19:50,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:19:50,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:19:50,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:50,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:19:50,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:52,241 INFO L124 PetriNetUnfolderBase]: 7182/10538 cut-off events. [2024-10-24 19:19:52,241 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2024-10-24 19:19:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22435 conditions, 10538 events. 7182/10538 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 71537 event pairs, 4852 based on Foata normal form. 0/6695 useless extension candidates. Maximal degree in co-relation 22359. Up to 9010 conditions per place. [2024-10-24 19:19:52,346 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 54 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2024-10-24 19:19:52,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 411 flow [2024-10-24 19:19:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:19:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:19:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-10-24 19:19:52,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-24 19:19:52,348 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 295 flow. Second operand 4 states and 134 transitions. [2024-10-24 19:19:52,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 411 flow [2024-10-24 19:19:52,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 407 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:19:52,354 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 299 flow [2024-10-24 19:19:52,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=299, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-10-24 19:19:52,355 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2024-10-24 19:19:52,355 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 299 flow [2024-10-24 19:19:52,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:19:52,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:52,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:52,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-24 19:19:52,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:52,560 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:52,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1238289957, now seen corresponding path program 1 times [2024-10-24 19:19:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:52,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571791451] [2024-10-24 19:19:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:52,561 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 [2024-10-24 19:19:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:52,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:52,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:19:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:52,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:19:52,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:52,727 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:19:52,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:52,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571791451] [2024-10-24 19:19:52,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571791451] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:19:52,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:19:52,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:19:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588312169] [2024-10-24 19:19:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:19:52,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:19:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:19:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:19:52,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:19:52,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-24 19:19:52,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:52,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:19:52,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:53,958 INFO L124 PetriNetUnfolderBase]: 8415/12414 cut-off events. [2024-10-24 19:19:53,958 INFO L125 PetriNetUnfolderBase]: For 1061/1061 co-relation queries the response was YES. [2024-10-24 19:19:53,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26771 conditions, 12414 events. 8415/12414 cut-off events. For 1061/1061 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 87551 event pairs, 5813 based on Foata normal form. 278/8300 useless extension candidates. Maximal degree in co-relation 26693. Up to 9041 conditions per place. [2024-10-24 19:19:54,048 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 77 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-10-24 19:19:54,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 535 flow [2024-10-24 19:19:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:19:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:19:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-10-24 19:19:54,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-10-24 19:19:54,050 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 299 flow. Second operand 4 states and 171 transitions. [2024-10-24 19:19:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 535 flow [2024-10-24 19:19:54,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 520 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:19:54,056 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 307 flow [2024-10-24 19:19:54,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-24 19:19:54,057 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2024-10-24 19:19:54,057 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 307 flow [2024-10-24 19:19:54,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-24 19:19:54,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:54,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:54,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:19:54,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:19:54,259 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:19:54,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash -417123471, now seen corresponding path program 1 times [2024-10-24 19:19:54,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200634205] [2024-10-24 19:19:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:19:54,260 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 [2024-10-24 19:19:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:54,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:19:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:19:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:19:54,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:19:54,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:54,372 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 [2024-10-24 19:19:54,393 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 [2024-10-24 19:19:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:19:54,560 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 [2024-10-24 19:19:54,578 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:19:54,579 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 [2024-10-24 19:19:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:54,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:19:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:55,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200634205] [2024-10-24 19:19:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200634205] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:19:55,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:19:55,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:19:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714901675] [2024-10-24 19:19:55,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:19:55,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:19:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:55,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:19:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:19:56,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 66 [2024-10-24 19:19:56,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 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) [2024-10-24 19:19:56,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:56,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 66 [2024-10-24 19:19:56,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:03,610 INFO L124 PetriNetUnfolderBase]: 18393/27640 cut-off events. [2024-10-24 19:20:03,610 INFO L125 PetriNetUnfolderBase]: For 5198/5198 co-relation queries the response was YES. [2024-10-24 19:20:03,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63602 conditions, 27640 events. 18393/27640 cut-off events. For 5198/5198 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 215219 event pairs, 12645 based on Foata normal form. 0/19455 useless extension candidates. Maximal degree in co-relation 43495. Up to 9616 conditions per place. [2024-10-24 19:20:03,814 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 107 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-10-24 19:20:03,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 979 flow [2024-10-24 19:20:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 19:20:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 19:20:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 433 transitions. [2024-10-24 19:20:03,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4686147186147186 [2024-10-24 19:20:03,817 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 307 flow. Second operand 14 states and 433 transitions. [2024-10-24 19:20:03,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 979 flow [2024-10-24 19:20:03,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 170 transitions, 970 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:03,829 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 618 flow [2024-10-24 19:20:03,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=618, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-10-24 19:20:03,830 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2024-10-24 19:20:03,830 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 618 flow [2024-10-24 19:20:03,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 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) [2024-10-24 19:20:03,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:03,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:03,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:04,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:04,032 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:04,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -417123472, now seen corresponding path program 1 times [2024-10-24 19:20:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279615736] [2024-10-24 19:20:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:04,034 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 [2024-10-24 19:20:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:04,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:04,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:20:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:04,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:20:04,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:04,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:20:04,149 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:20:04,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-24 19:20:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:20:04,193 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:04,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:04,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279615736] [2024-10-24 19:20:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279615736] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:04,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:04,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635280898] [2024-10-24 19:20:04,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:04,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:04,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:04,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:20:04,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 618 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:20:04,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:04,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:20:04,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:05,883 INFO L124 PetriNetUnfolderBase]: 11532/18365 cut-off events. [2024-10-24 19:20:05,884 INFO L125 PetriNetUnfolderBase]: For 9067/9067 co-relation queries the response was YES. [2024-10-24 19:20:05,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42288 conditions, 18365 events. 11532/18365 cut-off events. For 9067/9067 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 145004 event pairs, 8046 based on Foata normal form. 0/14951 useless extension candidates. Maximal degree in co-relation 34726. Up to 14950 conditions per place. [2024-10-24 19:20:06,031 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 69 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-10-24 19:20:06,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 778 flow [2024-10-24 19:20:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:20:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:20:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-10-24 19:20:06,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-10-24 19:20:06,032 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 618 flow. Second operand 5 states and 156 transitions. [2024-10-24 19:20:06,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 778 flow [2024-10-24 19:20:06,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 103 transitions, 775 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:06,047 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 637 flow [2024-10-24 19:20:06,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=637, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-10-24 19:20:06,048 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2024-10-24 19:20:06,048 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 637 flow [2024-10-24 19:20:06,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:20:06,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:06,048 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:20:06,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:06,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:06,250 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:06,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -913765977, now seen corresponding path program 2 times [2024-10-24 19:20:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011488562] [2024-10-24 19:20:06,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:06,251 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 [2024-10-24 19:20:06,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:06,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:06,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:20:06,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:20:06,331 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:06,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:20:06,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:06,353 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 [2024-10-24 19:20:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:06,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:07,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011488562] [2024-10-24 19:20:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011488562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:07,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:07,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:20:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358696977] [2024-10-24 19:20:07,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:07,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:20:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:20:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:20:07,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:20:07,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 637 flow. Second operand has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 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) [2024-10-24 19:20:07,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:07,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:20:07,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:10,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:17,880 INFO L124 PetriNetUnfolderBase]: 11562/18455 cut-off events. [2024-10-24 19:20:17,881 INFO L125 PetriNetUnfolderBase]: For 9255/9255 co-relation queries the response was YES. [2024-10-24 19:20:18,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42787 conditions, 18455 events. 11562/18455 cut-off events. For 9255/9255 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 145996 event pairs, 8046 based on Foata normal form. 30/15071 useless extension candidates. Maximal degree in co-relation 35119. Up to 14995 conditions per place. [2024-10-24 19:20:18,301 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 39 selfloop transitions, 107 changer transitions 0/163 dead transitions. [2024-10-24 19:20:18,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1421 flow [2024-10-24 19:20:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:20:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:20:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 636 transitions. [2024-10-24 19:20:18,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-10-24 19:20:18,305 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 637 flow. Second operand 22 states and 636 transitions. [2024-10-24 19:20:18,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1421 flow [2024-10-24 19:20:18,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 163 transitions, 1382 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:20:18,324 INFO L231 Difference]: Finished difference. Result has 119 places, 163 transitions, 1394 flow [2024-10-24 19:20:18,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1394, PETRI_PLACES=119, PETRI_TRANSITIONS=163} [2024-10-24 19:20:18,325 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2024-10-24 19:20:18,325 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 163 transitions, 1394 flow [2024-10-24 19:20:18,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 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) [2024-10-24 19:20:18,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:18,326 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:18,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-24 19:20:18,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:18,527 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:18,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1036105231, now seen corresponding path program 1 times [2024-10-24 19:20:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118526250] [2024-10-24 19:20:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:18,528 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 [2024-10-24 19:20:18,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:18,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:18,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:20:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:18,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:20:18,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:18,627 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 [2024-10-24 19:20:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:18,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:19,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:19,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118526250] [2024-10-24 19:20:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118526250] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:19,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:19,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:20:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432689115] [2024-10-24 19:20:19,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:19,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:20:19,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:20:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:20:19,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:20:19,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 163 transitions, 1394 flow. Second operand has 10 states, 10 states have (on average 25.7) internal successors, (257), 10 states have internal predecessors, (257), 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) [2024-10-24 19:20:19,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:19,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:20:19,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:25,958 INFO L124 PetriNetUnfolderBase]: 23510/36119 cut-off events. [2024-10-24 19:20:25,958 INFO L125 PetriNetUnfolderBase]: For 19453/19453 co-relation queries the response was YES. [2024-10-24 19:20:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84310 conditions, 36119 events. 23510/36119 cut-off events. For 19453/19453 co-relation queries the response was YES. Maximal size of possible extension queue 1854. Compared 295942 event pairs, 16270 based on Foata normal form. 0/30315 useless extension candidates. Maximal degree in co-relation 84067. Up to 12598 conditions per place. [2024-10-24 19:20:26,358 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 118 selfloop transitions, 100 changer transitions 0/235 dead transitions. [2024-10-24 19:20:26,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 235 transitions, 2054 flow [2024-10-24 19:20:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:20:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:20:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 363 transitions. [2024-10-24 19:20:26,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-24 19:20:26,361 INFO L175 Difference]: Start difference. First operand has 119 places, 163 transitions, 1394 flow. Second operand 10 states and 363 transitions. [2024-10-24 19:20:26,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 235 transitions, 2054 flow [2024-10-24 19:20:26,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 235 transitions, 1774 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-24 19:20:26,400 INFO L231 Difference]: Finished difference. Result has 121 places, 163 transitions, 1327 flow [2024-10-24 19:20:26,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1327, PETRI_PLACES=121, PETRI_TRANSITIONS=163} [2024-10-24 19:20:26,400 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2024-10-24 19:20:26,401 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 163 transitions, 1327 flow [2024-10-24 19:20:26,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.7) internal successors, (257), 10 states have internal predecessors, (257), 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) [2024-10-24 19:20:26,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:26,401 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:26,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-24 19:20:26,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:26,602 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:26,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1008799752, now seen corresponding path program 2 times [2024-10-24 19:20:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603459336] [2024-10-24 19:20:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:26,603 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 [2024-10-24 19:20:26,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:26,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:26,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:20:26,682 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:20:26,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:26,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:20:26,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:26,694 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 [2024-10-24 19:20:26,702 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 [2024-10-24 19:20:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:20:26,840 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 [2024-10-24 19:20:26,858 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:20:26,859 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 [2024-10-24 19:20:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:20:26,922 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:26,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603459336] [2024-10-24 19:20:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603459336] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:26,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:26,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953111806] [2024-10-24 19:20:26,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:26,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:26,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:20:26,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 163 transitions, 1327 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:20:26,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:26,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:20:26,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:30,646 INFO L124 PetriNetUnfolderBase]: 19251/30868 cut-off events. [2024-10-24 19:20:30,646 INFO L125 PetriNetUnfolderBase]: For 24505/24505 co-relation queries the response was YES. [2024-10-24 19:20:30,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69759 conditions, 30868 events. 19251/30868 cut-off events. For 24505/24505 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 262575 event pairs, 13413 based on Foata normal form. 1039/27585 useless extension candidates. Maximal degree in co-relation 69528. Up to 25203 conditions per place. [2024-10-24 19:20:30,964 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 130 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2024-10-24 19:20:30,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 161 transitions, 1595 flow [2024-10-24 19:20:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-10-24 19:20:30,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-10-24 19:20:30,966 INFO L175 Difference]: Start difference. First operand has 121 places, 163 transitions, 1327 flow. Second operand 4 states and 130 transitions. [2024-10-24 19:20:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 161 transitions, 1595 flow [2024-10-24 19:20:31,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 161 transitions, 1527 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:20:31,010 INFO L231 Difference]: Finished difference. Result has 118 places, 161 transitions, 1267 flow [2024-10-24 19:20:31,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1267, PETRI_PLACES=118, PETRI_TRANSITIONS=161} [2024-10-24 19:20:31,014 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2024-10-24 19:20:31,014 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 161 transitions, 1267 flow [2024-10-24 19:20:31,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:20:31,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:31,015 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:31,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:20:31,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:31,216 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:31,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1073675981, now seen corresponding path program 2 times [2024-10-24 19:20:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:31,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058594215] [2024-10-24 19:20:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:31,217 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 [2024-10-24 19:20:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:31,218 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:20:31,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:20:31,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:31,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:20:31,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:31,325 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 [2024-10-24 19:20:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:20:31,499 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:31,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058594215] [2024-10-24 19:20:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058594215] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:31,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:20:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858964733] [2024-10-24 19:20:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:31,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:31,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:20:31,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 161 transitions, 1267 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-10-24 19:20:31,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:31,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:20:31,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:34,768 INFO L124 PetriNetUnfolderBase]: 16082/26946 cut-off events. [2024-10-24 19:20:34,768 INFO L125 PetriNetUnfolderBase]: For 13902/13902 co-relation queries the response was YES. [2024-10-24 19:20:34,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56718 conditions, 26946 events. 16082/26946 cut-off events. For 13902/13902 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 236546 event pairs, 11263 based on Foata normal form. 787/24659 useless extension candidates. Maximal degree in co-relation 56490. Up to 21124 conditions per place. [2024-10-24 19:20:35,020 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 114 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-10-24 19:20:35,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 159 transitions, 1531 flow [2024-10-24 19:20:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-10-24 19:20:35,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-10-24 19:20:35,021 INFO L175 Difference]: Start difference. First operand has 118 places, 161 transitions, 1267 flow. Second operand 4 states and 136 transitions. [2024-10-24 19:20:35,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 159 transitions, 1531 flow [2024-10-24 19:20:35,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 159 transitions, 1513 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:20:35,033 INFO L231 Difference]: Finished difference. Result has 115 places, 159 transitions, 1285 flow [2024-10-24 19:20:35,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1285, PETRI_PLACES=115, PETRI_TRANSITIONS=159} [2024-10-24 19:20:35,034 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 47 predicate places. [2024-10-24 19:20:35,035 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 159 transitions, 1285 flow [2024-10-24 19:20:35,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2024-10-24 19:20:35,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:35,035 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:20:35,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:35,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:35,236 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 19:20:35,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash 333204377, now seen corresponding path program 3 times [2024-10-24 19:20:35,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:35,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403233918] [2024-10-24 19:20:35,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:20:35,237 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 [2024-10-24 19:20:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:35,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:35,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:20:35,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:20:35,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:35,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:20:35,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:35,486 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 [2024-10-24 19:20:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:36,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:38,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:38,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403233918] [2024-10-24 19:20:38,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403233918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:38,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:38,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:20:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112097760] [2024-10-24 19:20:38,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:38,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:20:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:20:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-24 19:20:38,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:20:38,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 159 transitions, 1285 flow. Second operand has 26 states, 26 states have (on average 25.76923076923077) internal successors, (670), 26 states have internal predecessors, (670), 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) [2024-10-24 19:20:38,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:38,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:20:38,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:49,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:51,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:52,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []