./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/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 20:00:09,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 20:00:09,964 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 20:00:09,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 20:00:09,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 20:00:09,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 20:00:09,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 20:00:09,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 20:00:09,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 20:00:09,996 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 20:00:09,996 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 20:00:09,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 20:00:09,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 20:00:09,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 20:00:09,997 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 20:00:09,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 20:00:09,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 20:00:09,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 20:00:09,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 20:00:09,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 20:00:09,999 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 20:00:09,999 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 20:00:10,000 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 20:00:10,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 20:00:10,000 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 20:00:10,000 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 20:00:10,000 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 20:00:10,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 20:00:10,001 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 20:00:10,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 20:00:10,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 20:00:10,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 20:00:10,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:10,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 20:00:10,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 20:00:10,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 20:00:10,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 20:00:10,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2024-10-14 20:00:10,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 20:00:10,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 20:00:10,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 20:00:10,236 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 20:00:10,236 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 20:00:10,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2024-10-14 20:00:11,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 20:00:11,602 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 20:00:11,602 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2024-10-14 20:00:11,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4413f7ea8/ac8eac749f97414a8db4991da07fc722/FLAG81e2a4c38 [2024-10-14 20:00:12,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4413f7ea8/ac8eac749f97414a8db4991da07fc722 [2024-10-14 20:00:12,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 20:00:12,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 20:00:12,017 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:12,017 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 20:00:12,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 20:00:12,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:12" (1/1) ... [2024-10-14 20:00:12,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d48f3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:12, skipping insertion in model container [2024-10-14 20:00:12,023 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:12" (1/1) ... [2024-10-14 20:00:12,040 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:12,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:12,193 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 20:00:12,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bf34b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:12, skipping insertion in model container [2024-10-14 20:00:12,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:12,194 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 20:00:12,196 INFO L158 Benchmark]: Toolchain (without parser) took 180.95ms. Allocated memory is still 182.5MB. Free memory was 115.7MB in the beginning and 105.0MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 20:00:12,196 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory is still 76.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 20:00:12,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.94ms. Allocated memory is still 182.5MB. Free memory was 115.5MB in the beginning and 105.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 20:00:12,200 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory is still 76.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.94ms. Allocated memory is still 182.5MB. Free memory was 115.5MB in the beginning and 105.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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/unroll-2.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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 20:00:13,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 20:00:13,927 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 20:00:13,931 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 20:00:13,932 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 20:00:13,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 20:00:13,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 20:00:13,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 20:00:13,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 20:00:13,963 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 20:00:13,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 20:00:13,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 20:00:13,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 20:00:13,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 20:00:13,964 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 20:00:13,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 20:00:13,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 20:00:13,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 20:00:13,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 20:00:13,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 20:00:13,968 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 20:00:13,969 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 20:00:13,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 20:00:13,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 20:00:13,969 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 20:00:13,970 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 20:00:13,970 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 20:00:13,970 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 20:00:13,971 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 20:00:13,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 20:00:13,971 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 20:00:13,971 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 20:00:13,971 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 20:00:13,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 20:00:13,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 20:00:13,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:13,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 20:00:13,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 20:00:13,973 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 20:00:13,974 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 20:00:13,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2024-10-14 20:00:14,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 20:00:14,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 20:00:14,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 20:00:14,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 20:00:14,252 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 20:00:14,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2024-10-14 20:00:15,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 20:00:15,581 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 20:00:15,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2024-10-14 20:00:15,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36abcf383/94ce042fa4a4467b89ed7cf6fa770bad/FLAGa0b3fc573 [2024-10-14 20:00:16,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36abcf383/94ce042fa4a4467b89ed7cf6fa770bad [2024-10-14 20:00:16,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 20:00:16,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 20:00:16,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:16,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 20:00:16,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 20:00:16,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c99fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16, skipping insertion in model container [2024-10-14 20:00:16,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,035 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:16,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:16,227 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 20:00:16,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 20:00:16,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:16,258 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 20:00:16,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 20:00:16,300 INFO L204 MainTranslator]: Completed translation [2024-10-14 20:00:16,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16 WrapperNode [2024-10-14 20:00:16,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 20:00:16,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 20:00:16,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 20:00:16,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 20:00:16,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,339 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 127 [2024-10-14 20:00:16,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 20:00:16,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 20:00:16,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 20:00:16,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 20:00:16,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,377 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 20:00:16,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,397 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,402 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 20:00:16,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 20:00:16,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 20:00:16,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 20:00:16,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (1/1) ... [2024-10-14 20:00:16,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 20:00:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 20:00:16,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 20:00:16,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 20:00:16,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 20:00:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 20:00:16,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 20:00:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 20:00:16,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 20:00:16,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 20:00:16,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 20:00:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 20:00:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 20:00:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 20:00:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 20:00:16,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 20:00:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 20:00:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 20:00:16,477 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 20:00:16,576 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 20:00:16,578 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 20:00:16,866 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 20:00:16,867 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 20:00:17,044 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 20:00:17,044 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 20:00:17,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:00:17 BoogieIcfgContainer [2024-10-14 20:00:17,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 20:00:17,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 20:00:17,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 20:00:17,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 20:00:17,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:00:16" (1/3) ... [2024-10-14 20:00:17,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b78d821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:00:17, skipping insertion in model container [2024-10-14 20:00:17,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:00:16" (2/3) ... [2024-10-14 20:00:17,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b78d821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:00:17, skipping insertion in model container [2024-10-14 20:00:17,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:00:17" (3/3) ... [2024-10-14 20:00:17,052 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2024-10-14 20:00:17,063 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 20:00:17,063 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-14 20:00:17,063 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 20:00:17,096 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 20:00:17,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 82 flow [2024-10-14 20:00:17,136 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-10-14 20:00:17,136 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 20:00:17,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 3/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 49 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-14 20:00:17,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 82 flow [2024-10-14 20:00:17,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 31 transitions, 74 flow [2024-10-14 20:00:17,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 20:00:17,151 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;@7baf42ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 20:00:17,151 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-14 20:00:17,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 20:00:17,153 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 20:00:17,153 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 20:00:17,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:17,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 20:00:17,154 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:17,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 439411, now seen corresponding path program 1 times [2024-10-14 20:00:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766130521] [2024-10-14 20:00:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:17,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 20:00:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:17,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:17,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:17,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:17,290 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:17,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766130521] [2024-10-14 20:00:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766130521] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:17,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 20:00:17,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816421859] [2024-10-14 20:00:17,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:17,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 20:00:17,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 20:00:17,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 20:00:17,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:17,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:17,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:17,439 INFO L124 PetriNetUnfolderBase]: 75/171 cut-off events. [2024-10-14 20:00:17,440 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-14 20:00:17,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 171 events. 75/171 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 630 event pairs, 53 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 131 conditions per place. [2024-10-14 20:00:17,443 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-10-14 20:00:17,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 108 flow [2024-10-14 20:00:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-14 20:00:17,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-10-14 20:00:17,454 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 74 flow. Second operand 3 states and 55 transitions. [2024-10-14 20:00:17,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 108 flow [2024-10-14 20:00:17,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:17,457 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 64 flow [2024-10-14 20:00:17,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-10-14 20:00:17,460 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-10-14 20:00:17,461 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 64 flow [2024-10-14 20:00:17,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:17,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:17,461 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 20:00:17,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 20:00:17,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:17,662 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:17,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 439412, now seen corresponding path program 1 times [2024-10-14 20:00:17,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:17,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283390624] [2024-10-14 20:00:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:17,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:17,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 20:00:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:17,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 20:00:17,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:17,761 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 [2024-10-14 20:00:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:17,833 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:17,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:17,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283390624] [2024-10-14 20:00:17,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283390624] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:17,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:17,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754422706] [2024-10-14 20:00:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:17,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:17,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:17,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:17,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:17,962 INFO L124 PetriNetUnfolderBase]: 75/173 cut-off events. [2024-10-14 20:00:17,962 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 20:00:17,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 173 events. 75/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 634 event pairs, 53 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 300. Up to 135 conditions per place. [2024-10-14 20:00:17,964 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-14 20:00:17,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 114 flow [2024-10-14 20:00:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-14 20:00:17,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-10-14 20:00:17,965 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 64 flow. Second operand 3 states and 58 transitions. [2024-10-14 20:00:17,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 114 flow [2024-10-14 20:00:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:17,966 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 74 flow [2024-10-14 20:00:17,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-14 20:00:17,967 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-14 20:00:17,967 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 74 flow [2024-10-14 20:00:17,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:17,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:17,968 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 20:00:17,975 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 [2024-10-14 20:00:18,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:18,171 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:18,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 422288621, now seen corresponding path program 1 times [2024-10-14 20:00:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:18,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728336479] [2024-10-14 20:00:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:18,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:18,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 20:00:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:18,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 20:00:18,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:18,254 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 [2024-10-14 20:00:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:18,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:18,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728336479] [2024-10-14 20:00:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728336479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:18,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:18,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2024-10-14 20:00:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611545820] [2024-10-14 20:00:18,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:18,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 20:00:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 20:00:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-14 20:00:18,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:18,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 74 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2024-10-14 20:00:18,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:18,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:19,042 INFO L124 PetriNetUnfolderBase]: 78/182 cut-off events. [2024-10-14 20:00:19,042 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 20:00:19,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 182 events. 78/182 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 684 event pairs, 53 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 335. Up to 138 conditions per place. [2024-10-14 20:00:19,044 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 21 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2024-10-14 20:00:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 170 flow [2024-10-14 20:00:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 20:00:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 20:00:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-10-14 20:00:19,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-10-14 20:00:19,046 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 74 flow. Second operand 9 states and 134 transitions. [2024-10-14 20:00:19,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 170 flow [2024-10-14 20:00:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:19,047 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 146 flow [2024-10-14 20:00:19,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-10-14 20:00:19,048 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-10-14 20:00:19,048 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 146 flow [2024-10-14 20:00:19,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2024-10-14 20:00:19,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:19,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:19,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:19,252 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:19,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash 443714890, now seen corresponding path program 1 times [2024-10-14 20:00:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882159770] [2024-10-14 20:00:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:19,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:19,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:19,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 20:00:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:19,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 20:00:19,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:19,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:19,326 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:19,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:19,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882159770] [2024-10-14 20:00:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882159770] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:19,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:19,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643144058] [2024-10-14 20:00:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:19,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:19,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-14 20:00:19,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:19,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:19,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-14 20:00:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:19,422 INFO L124 PetriNetUnfolderBase]: 78/164 cut-off events. [2024-10-14 20:00:19,422 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-14 20:00:19,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 164 events. 78/164 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 514 event pairs, 53 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 321. Up to 133 conditions per place. [2024-10-14 20:00:19,423 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-10-14 20:00:19,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 202 flow [2024-10-14 20:00:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-10-14 20:00:19,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40441176470588236 [2024-10-14 20:00:19,425 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 146 flow. Second operand 4 states and 55 transitions. [2024-10-14 20:00:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 202 flow [2024-10-14 20:00:19,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 188 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:19,427 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 136 flow [2024-10-14 20:00:19,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-14 20:00:19,427 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-10-14 20:00:19,427 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 136 flow [2024-10-14 20:00:19,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:19,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:19,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:19,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 20:00:19,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:19,628 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:19,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 443714891, now seen corresponding path program 1 times [2024-10-14 20:00:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755474760] [2024-10-14 20:00:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:19,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 20:00:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:19,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 20:00:19,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:19,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:19,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-14 20:00:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:19,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755474760] [2024-10-14 20:00:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755474760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:19,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926703248] [2024-10-14 20:00:19,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:19,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:20,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:20,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:20,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:20,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:20,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:20,247 INFO L124 PetriNetUnfolderBase]: 151/291 cut-off events. [2024-10-14 20:00:20,248 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-14 20:00:20,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 291 events. 151/291 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1098 event pairs, 53 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 578. Up to 141 conditions per place. [2024-10-14 20:00:20,249 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 38 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-10-14 20:00:20,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 259 flow [2024-10-14 20:00:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:00:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:00:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-10-14 20:00:20,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5245098039215687 [2024-10-14 20:00:20,253 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 136 flow. Second operand 6 states and 107 transitions. [2024-10-14 20:00:20,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 259 flow [2024-10-14 20:00:20,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:20,254 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 157 flow [2024-10-14 20:00:20,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-10-14 20:00:20,257 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-10-14 20:00:20,257 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 157 flow [2024-10-14 20:00:20,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:20,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:20,258 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:20,261 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 [2024-10-14 20:00:20,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:20,459 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:20,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1208262223, now seen corresponding path program 1 times [2024-10-14 20:00:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294793390] [2024-10-14 20:00:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:20,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:20,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 20:00:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:20,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 20:00:20,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:20,522 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 [2024-10-14 20:00:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:20,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:21,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294793390] [2024-10-14 20:00:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294793390] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:21,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:21,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-14 20:00:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580222030] [2024-10-14 20:00:21,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:21,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 20:00:21,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 20:00:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-14 20:00:21,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-14 20:00:21,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 157 flow. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:21,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:21,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-14 20:00:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:22,687 INFO L124 PetriNetUnfolderBase]: 409/805 cut-off events. [2024-10-14 20:00:22,687 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-10-14 20:00:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 805 events. 409/805 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3821 event pairs, 261 based on Foata normal form. 0/671 useless extension candidates. Maximal degree in co-relation 1162. Up to 261 conditions per place. [2024-10-14 20:00:22,693 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 68 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-10-14 20:00:22,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 445 flow [2024-10-14 20:00:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 20:00:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 20:00:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-10-14 20:00:22,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5352941176470588 [2024-10-14 20:00:22,695 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 157 flow. Second operand 10 states and 182 transitions. [2024-10-14 20:00:22,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 445 flow [2024-10-14 20:00:22,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 87 transitions, 436 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:22,699 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 218 flow [2024-10-14 20:00:22,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-10-14 20:00:22,700 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2024-10-14 20:00:22,701 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 218 flow [2024-10-14 20:00:22,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:22,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:22,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:22,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 20:00:22,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:22,902 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:22,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1201322073, now seen corresponding path program 1 times [2024-10-14 20:00:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:22,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677487581] [2024-10-14 20:00:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:22,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:22,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 20:00:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:22,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 20:00:22,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:23,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:23,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-14 20:00:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:23,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:23,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677487581] [2024-10-14 20:00:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677487581] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:23,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:23,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249836345] [2024-10-14 20:00:23,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:23,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:23,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-14 20:00:23,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:23,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:23,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-14 20:00:23,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:23,592 INFO L124 PetriNetUnfolderBase]: 737/1319 cut-off events. [2024-10-14 20:00:23,592 INFO L125 PetriNetUnfolderBase]: For 611/621 co-relation queries the response was YES. [2024-10-14 20:00:23,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3208 conditions, 1319 events. 737/1319 cut-off events. For 611/621 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6386 event pairs, 243 based on Foata normal form. 0/1127 useless extension candidates. Maximal degree in co-relation 2451. Up to 763 conditions per place. [2024-10-14 20:00:23,606 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 50 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-10-14 20:00:23,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 408 flow [2024-10-14 20:00:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:00:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:00:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-10-14 20:00:23,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-10-14 20:00:23,608 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 218 flow. Second operand 6 states and 99 transitions. [2024-10-14 20:00:23,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 408 flow [2024-10-14 20:00:23,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:23,613 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 237 flow [2024-10-14 20:00:23,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-10-14 20:00:23,614 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-10-14 20:00:23,615 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 237 flow [2024-10-14 20:00:23,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:23,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:23,615 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 20:00:23,619 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 [2024-10-14 20:00:23,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:23,816 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:23,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2072299304, now seen corresponding path program 2 times [2024-10-14 20:00:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:23,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615020203] [2024-10-14 20:00:23,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:23,820 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:23,821 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 (9)] Waiting until timeout for monitored process [2024-10-14 20:00:23,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:00:23,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:23,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 20:00:23,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:23,890 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 [2024-10-14 20:00:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:24,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:24,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615020203] [2024-10-14 20:00:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615020203] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:24,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:24,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 20:00:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267960010] [2024-10-14 20:00:24,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:24,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 20:00:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 20:00:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 20:00:24,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:24,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 237 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:24,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:24,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:24,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:26,605 INFO L124 PetriNetUnfolderBase]: 605/1184 cut-off events. [2024-10-14 20:00:26,605 INFO L125 PetriNetUnfolderBase]: For 550/557 co-relation queries the response was YES. [2024-10-14 20:00:26,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3043 conditions, 1184 events. 605/1184 cut-off events. For 550/557 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6172 event pairs, 495 based on Foata normal form. 6/1094 useless extension candidates. Maximal degree in co-relation 2327. Up to 1062 conditions per place. [2024-10-14 20:00:26,609 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 29 changer transitions 0/62 dead transitions. [2024-10-14 20:00:26,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 62 transitions, 515 flow [2024-10-14 20:00:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 20:00:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 20:00:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 287 transitions. [2024-10-14 20:00:26,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2024-10-14 20:00:26,612 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 237 flow. Second operand 21 states and 287 transitions. [2024-10-14 20:00:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 62 transitions, 515 flow [2024-10-14 20:00:26,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 498 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:26,617 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 470 flow [2024-10-14 20:00:26,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=470, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-10-14 20:00:26,618 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 42 predicate places. [2024-10-14 20:00:26,619 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 470 flow [2024-10-14 20:00:26,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:26,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:26,619 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:26,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 20:00:26,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:26,822 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:26,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1413720942, now seen corresponding path program 1 times [2024-10-14 20:00:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741645459] [2024-10-14 20:00:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:26,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 20:00:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:26,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 20:00:26,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:26,881 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 [2024-10-14 20:00:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:27,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:27,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741645459] [2024-10-14 20:00:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741645459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:27,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:27,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-14 20:00:27,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618442545] [2024-10-14 20:00:27,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:27,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 20:00:27,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 20:00:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-14 20:00:28,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-10-14 20:00:28,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 470 flow. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:28,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:28,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-10-14 20:00:28,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:29,099 INFO L124 PetriNetUnfolderBase]: 651/1174 cut-off events. [2024-10-14 20:00:29,099 INFO L125 PetriNetUnfolderBase]: For 662/679 co-relation queries the response was YES. [2024-10-14 20:00:29,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1174 events. 651/1174 cut-off events. For 662/679 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5365 event pairs, 411 based on Foata normal form. 0/1046 useless extension candidates. Maximal degree in co-relation 3004. Up to 443 conditions per place. [2024-10-14 20:00:29,105 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 78 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-10-14 20:00:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 106 transitions, 810 flow [2024-10-14 20:00:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 20:00:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 20:00:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-10-14 20:00:29,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5029411764705882 [2024-10-14 20:00:29,107 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 470 flow. Second operand 10 states and 171 transitions. [2024-10-14 20:00:29,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 106 transitions, 810 flow [2024-10-14 20:00:29,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 722 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-10-14 20:00:29,111 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 458 flow [2024-10-14 20:00:29,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=458, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-10-14 20:00:29,112 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 45 predicate places. [2024-10-14 20:00:29,113 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 458 flow [2024-10-14 20:00:29,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:29,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:29,117 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 [2024-10-14 20:00:29,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,314 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:29,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1479984949, now seen corresponding path program 1 times [2024-10-14 20:00:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910368428] [2024-10-14 20:00:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:29,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:29,316 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:29,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 20:00:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:29,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:29,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:29,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:29,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:29,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910368428] [2024-10-14 20:00:29,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910368428] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:29,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:29,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 20:00:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855649656] [2024-10-14 20:00:29,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:29,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 20:00:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 20:00:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 20:00:29,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:29,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:29,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:29,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:29,523 INFO L124 PetriNetUnfolderBase]: 605/1123 cut-off events. [2024-10-14 20:00:29,523 INFO L125 PetriNetUnfolderBase]: For 642/647 co-relation queries the response was YES. [2024-10-14 20:00:29,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 1123 events. 605/1123 cut-off events. For 642/647 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5294 event pairs, 188 based on Foata normal form. 3/1126 useless extension candidates. Maximal degree in co-relation 3082. Up to 784 conditions per place. [2024-10-14 20:00:29,527 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 74 selfloop transitions, 5 changer transitions 1/85 dead transitions. [2024-10-14 20:00:29,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 691 flow [2024-10-14 20:00:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 20:00:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 20:00:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-14 20:00:29,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-10-14 20:00:29,529 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 458 flow. Second operand 3 states and 70 transitions. [2024-10-14 20:00:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 691 flow [2024-10-14 20:00:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:29,534 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 482 flow [2024-10-14 20:00:29,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-10-14 20:00:29,535 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 44 predicate places. [2024-10-14 20:00:29,536 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 482 flow [2024-10-14 20:00:29,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:29,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:29,536 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:29,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:29,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,739 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:29,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1505706684, now seen corresponding path program 2 times [2024-10-14 20:00:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:29,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169667584] [2024-10-14 20:00:29,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:29,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:29,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:29,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:29,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 20:00:29,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:29,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 20:00:29,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:29,794 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 [2024-10-14 20:00:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 20:00:29,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 20:00:30,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169667584] [2024-10-14 20:00:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169667584] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:30,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 20:00:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693793583] [2024-10-14 20:00:30,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:30,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:30,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-14 20:00:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 482 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:30,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-14 20:00:30,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:30,979 INFO L124 PetriNetUnfolderBase]: 605/1106 cut-off events. [2024-10-14 20:00:30,980 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-10-14 20:00:30,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3233 conditions, 1106 events. 605/1106 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5182 event pairs, 333 based on Foata normal form. 18/1124 useless extension candidates. Maximal degree in co-relation 3175. Up to 790 conditions per place. [2024-10-14 20:00:30,984 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 56 selfloop transitions, 23 changer transitions 0/83 dead transitions. [2024-10-14 20:00:30,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 688 flow [2024-10-14 20:00:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 20:00:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 20:00:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-10-14 20:00:30,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-10-14 20:00:30,986 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 482 flow. Second operand 5 states and 84 transitions. [2024-10-14 20:00:30,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 688 flow [2024-10-14 20:00:30,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 674 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:30,992 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 507 flow [2024-10-14 20:00:30,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2024-10-14 20:00:30,993 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 44 predicate places. [2024-10-14 20:00:30,993 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 507 flow [2024-10-14 20:00:30,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:30,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:30,993 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:31,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:31,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,194 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:31,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash 352588861, now seen corresponding path program 2 times [2024-10-14 20:00:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426254991] [2024-10-14 20:00:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:31,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:31,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 20:00:31,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:31,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:31,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 20:00:31,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:31,252 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 [2024-10-14 20:00:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 20:00:31,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:31,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:31,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426254991] [2024-10-14 20:00:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426254991] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:31,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 20:00:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78443770] [2024-10-14 20:00:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:31,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 20:00:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 20:00:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 20:00:31,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-14 20:00:31,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:31,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-14 20:00:31,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:31,638 INFO L124 PetriNetUnfolderBase]: 605/1087 cut-off events. [2024-10-14 20:00:31,638 INFO L125 PetriNetUnfolderBase]: For 1127/1127 co-relation queries the response was YES. [2024-10-14 20:00:31,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 1087 events. 605/1087 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4885 event pairs, 288 based on Foata normal form. 32/1119 useless extension candidates. Maximal degree in co-relation 3202. Up to 655 conditions per place. [2024-10-14 20:00:31,643 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 64 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-10-14 20:00:31,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 766 flow [2024-10-14 20:00:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 20:00:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 20:00:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-14 20:00:31,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-10-14 20:00:31,644 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 507 flow. Second operand 5 states and 78 transitions. [2024-10-14 20:00:31,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 766 flow [2024-10-14 20:00:31,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 692 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 20:00:31,647 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 477 flow [2024-10-14 20:00:31,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2024-10-14 20:00:31,648 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 40 predicate places. [2024-10-14 20:00:31,648 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 477 flow [2024-10-14 20:00:31,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:31,649 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:31,651 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 (13)] Ended with exit code 0 [2024-10-14 20:00:31,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,849 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:31,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1549393453, now seen corresponding path program 1 times [2024-10-14 20:00:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675691512] [2024-10-14 20:00:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:31,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:31,853 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:31,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 20:00:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:31,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 20:00:31,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:31,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:31,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675691512] [2024-10-14 20:00:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675691512] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:31,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:31,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-10-14 20:00:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017605919] [2024-10-14 20:00:31,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:31,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 20:00:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 20:00:31,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-14 20:00:31,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:31,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:31,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:31,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:32,459 INFO L124 PetriNetUnfolderBase]: 1172/2104 cut-off events. [2024-10-14 20:00:32,460 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2024-10-14 20:00:32,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 2104 events. 1172/2104 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11115 event pairs, 173 based on Foata normal form. 138/2242 useless extension candidates. Maximal degree in co-relation 6014. Up to 439 conditions per place. [2024-10-14 20:00:32,469 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 147 selfloop transitions, 28 changer transitions 0/177 dead transitions. [2024-10-14 20:00:32,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 177 transitions, 1299 flow [2024-10-14 20:00:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 20:00:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 20:00:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-10-14 20:00:32,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6838235294117647 [2024-10-14 20:00:32,483 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 477 flow. Second operand 8 states and 186 transitions. [2024-10-14 20:00:32,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 177 transitions, 1299 flow [2024-10-14 20:00:32,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 177 transitions, 1193 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:32,490 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 663 flow [2024-10-14 20:00:32,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=663, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-10-14 20:00:32,491 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-10-14 20:00:32,492 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 663 flow [2024-10-14 20:00:32,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:32,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:32,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:32,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 20:00:32,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:32,695 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:32,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:32,695 INFO L85 PathProgramCache]: Analyzing trace with hash -351612670, now seen corresponding path program 1 times [2024-10-14 20:00:32,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812486274] [2024-10-14 20:00:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:32,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:32,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:32,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:32,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 20:00:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:32,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 20:00:32,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:32,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:32,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812486274] [2024-10-14 20:00:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812486274] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 20:00:32,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 20:00:32,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-10-14 20:00:32,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373166970] [2024-10-14 20:00:32,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:32,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-14 20:00:32,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:32,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 663 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:32,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:32,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:32,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:33,091 INFO L124 PetriNetUnfolderBase]: 1148/2050 cut-off events. [2024-10-14 20:00:33,091 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2024-10-14 20:00:33,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7561 conditions, 2050 events. 1148/2050 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10426 event pairs, 174 based on Foata normal form. 30/2080 useless extension candidates. Maximal degree in co-relation 7502. Up to 1104 conditions per place. [2024-10-14 20:00:33,100 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 83 selfloop transitions, 34 changer transitions 1/120 dead transitions. [2024-10-14 20:00:33,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 120 transitions, 1083 flow [2024-10-14 20:00:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-10-14 20:00:33,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2024-10-14 20:00:33,102 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 663 flow. Second operand 4 states and 89 transitions. [2024-10-14 20:00:33,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 120 transitions, 1083 flow [2024-10-14 20:00:33,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 1033 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-14 20:00:33,109 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 879 flow [2024-10-14 20:00:33,110 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=879, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-10-14 20:00:33,110 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 53 predicate places. [2024-10-14 20:00:33,110 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 879 flow [2024-10-14 20:00:33,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,111 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:33,111 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:33,114 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 (15)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:33,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,311 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:33,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 216227750, now seen corresponding path program 2 times [2024-10-14 20:00:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:33,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409422589] [2024-10-14 20:00:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:33,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:33,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:33,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 20:00:33,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:00:33,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:33,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:33,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 20:00:33,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:33,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:33,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409422589] [2024-10-14 20:00:33,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409422589] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:33,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:33,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:33,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593177287] [2024-10-14 20:00:33,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:33,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:33,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:33,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:33,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 879 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:33,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:33,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:33,622 INFO L124 PetriNetUnfolderBase]: 1109/1957 cut-off events. [2024-10-14 20:00:33,622 INFO L125 PetriNetUnfolderBase]: For 5659/5659 co-relation queries the response was YES. [2024-10-14 20:00:33,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8492 conditions, 1957 events. 1109/1957 cut-off events. For 5659/5659 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9785 event pairs, 591 based on Foata normal form. 9/1966 useless extension candidates. Maximal degree in co-relation 8432. Up to 1477 conditions per place. [2024-10-14 20:00:33,637 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 104 selfloop transitions, 8 changer transitions 8/122 dead transitions. [2024-10-14 20:00:33,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 1245 flow [2024-10-14 20:00:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-10-14 20:00:33,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2024-10-14 20:00:33,639 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 879 flow. Second operand 4 states and 87 transitions. [2024-10-14 20:00:33,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 1245 flow [2024-10-14 20:00:33,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 1208 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:33,650 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 877 flow [2024-10-14 20:00:33,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=877, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-10-14 20:00:33,651 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 57 predicate places. [2024-10-14 20:00:33,651 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 877 flow [2024-10-14 20:00:33,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:33,651 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:33,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-14 20:00:33,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,854 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:33,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -574911979, now seen corresponding path program 2 times [2024-10-14 20:00:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654682846] [2024-10-14 20:00:33,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:33,856 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:33,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 20:00:33,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 20:00:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:33,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 20:00:33,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:33,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:33,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654682846] [2024-10-14 20:00:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654682846] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 20:00:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79183330] [2024-10-14 20:00:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:33,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 20:00:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 20:00:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 20:00:33,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:33,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 877 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:33,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:34,292 INFO L124 PetriNetUnfolderBase]: 1112/1948 cut-off events. [2024-10-14 20:00:34,292 INFO L125 PetriNetUnfolderBase]: For 6086/6086 co-relation queries the response was YES. [2024-10-14 20:00:34,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 1948 events. 1112/1948 cut-off events. For 6086/6086 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9571 event pairs, 455 based on Foata normal form. 12/1960 useless extension candidates. Maximal degree in co-relation 8447. Up to 1225 conditions per place. [2024-10-14 20:00:34,301 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 121 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-10-14 20:00:34,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1504 flow [2024-10-14 20:00:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 20:00:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 20:00:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-10-14 20:00:34,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-10-14 20:00:34,302 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 877 flow. Second operand 6 states and 127 transitions. [2024-10-14 20:00:34,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1504 flow [2024-10-14 20:00:34,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 151 transitions, 1460 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:34,334 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 952 flow [2024-10-14 20:00:34,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=952, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-10-14 20:00:34,335 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 59 predicate places. [2024-10-14 20:00:34,335 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 952 flow [2024-10-14 20:00:34,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:34,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:34,335 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:34,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-14 20:00:34,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:34,536 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:34,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -735659947, now seen corresponding path program 3 times [2024-10-14 20:00:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821989360] [2024-10-14 20:00:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 20:00:34,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:34,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-14 20:00:34,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 20:00:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:34,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:34,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:34,616 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:34,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:34,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821989360] [2024-10-14 20:00:34,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821989360] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:34,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:34,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140117461] [2024-10-14 20:00:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:34,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:34,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:34,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 952 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:34,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:34,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:34,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:34,901 INFO L124 PetriNetUnfolderBase]: 1304/2272 cut-off events. [2024-10-14 20:00:34,902 INFO L125 PetriNetUnfolderBase]: For 8197/8197 co-relation queries the response was YES. [2024-10-14 20:00:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10496 conditions, 2272 events. 1304/2272 cut-off events. For 8197/8197 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11568 event pairs, 315 based on Foata normal form. 66/2338 useless extension candidates. Maximal degree in co-relation 10433. Up to 1773 conditions per place. [2024-10-14 20:00:34,911 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 121 selfloop transitions, 14 changer transitions 0/137 dead transitions. [2024-10-14 20:00:34,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 1545 flow [2024-10-14 20:00:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-10-14 20:00:34,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-10-14 20:00:34,912 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 952 flow. Second operand 4 states and 84 transitions. [2024-10-14 20:00:34,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 1545 flow [2024-10-14 20:00:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1479 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-14 20:00:34,921 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 971 flow [2024-10-14 20:00:34,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=971, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-10-14 20:00:34,922 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 60 predicate places. [2024-10-14 20:00:34,922 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 971 flow [2024-10-14 20:00:34,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:34,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:34,922 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:34,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-14 20:00:35,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:35,123 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:35,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:35,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1312274045, now seen corresponding path program 4 times [2024-10-14 20:00:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:35,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749564784] [2024-10-14 20:00:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 20:00:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:35,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:35,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-14 20:00:35,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 20:00:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:35,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 20:00:35,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 20:00:35,184 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:35,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:35,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749564784] [2024-10-14 20:00:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749564784] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:35,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:35,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 20:00:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747397367] [2024-10-14 20:00:35,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:35,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:35,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-14 20:00:35,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 971 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:35,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:35,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-14 20:00:35,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:35,466 INFO L124 PetriNetUnfolderBase]: 1274/2242 cut-off events. [2024-10-14 20:00:35,466 INFO L125 PetriNetUnfolderBase]: For 9201/9201 co-relation queries the response was YES. [2024-10-14 20:00:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10612 conditions, 2242 events. 1274/2242 cut-off events. For 9201/9201 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11620 event pairs, 495 based on Foata normal form. 30/2272 useless extension candidates. Maximal degree in co-relation 10547. Up to 1357 conditions per place. [2024-10-14 20:00:35,478 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 142 selfloop transitions, 9 changer transitions 7/160 dead transitions. [2024-10-14 20:00:35,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 160 transitions, 1830 flow [2024-10-14 20:00:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 20:00:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 20:00:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-14 20:00:35,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 20:00:35,479 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 971 flow. Second operand 4 states and 85 transitions. [2024-10-14 20:00:35,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 160 transitions, 1830 flow [2024-10-14 20:00:35,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 160 transitions, 1812 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-14 20:00:35,492 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 1016 flow [2024-10-14 20:00:35,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1016, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-10-14 20:00:35,493 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-10-14 20:00:35,493 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 1016 flow [2024-10-14 20:00:35,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:35,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:35,497 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:35,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-14 20:00:35,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:35,698 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 20:00:35,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2068304683, now seen corresponding path program 5 times [2024-10-14 20:00:35,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:35,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812792989] [2024-10-14 20:00:35,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 20:00:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:35,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:35,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-14 20:00:35,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 20:00:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:35,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 20:00:35,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:35,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 33 [2024-10-14 20:00:36,255 INFO L349 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2024-10-14 20:00:36,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 210 treesize of output 106 [2024-10-14 20:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:36,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:40,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1279 treesize of output 1223