./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.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/chl-node-subst.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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:49:11,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:49:11,551 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:49:11,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:49:11,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:49:11,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:49:11,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:49:11,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:49:11,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:49:11,609 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:49:11,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:49:11,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:49:11,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:49:11,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:49:11,611 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:49:11,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:49:11,612 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:49:11,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:49:11,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:49:11,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:49:11,613 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:49:11,613 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:49:11,613 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:49:11,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:49:11,614 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:49:11,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:49:11,614 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:49:11,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:49:11,615 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:49:11,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:49:11,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:49:11,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:49:11,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:49:11,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:49:11,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:49:11,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:49:11,620 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:49:11,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:49:11,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:49:11,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:49:11,621 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:49:11,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:49:11,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-10-14 19:49:11,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:49:11,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:49:11,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:49:11,933 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:49:11,933 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:49:11,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-14 19:49:13,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:49:13,528 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:49:13,528 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-14 19:49:13,536 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca55da43b/ad690a5e068649a3a240d99f24cae4b3/FLAG1f7607cd7 [2024-10-14 19:49:13,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca55da43b/ad690a5e068649a3a240d99f24cae4b3 [2024-10-14 19:49:13,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:49:13,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:49:13,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:49:13,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:49:13,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:49:13,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:49:13" (1/1) ... [2024-10-14 19:49:13,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebc41ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:13, skipping insertion in model container [2024-10-14 19:49:13,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:49:13" (1/1) ... [2024-10-14 19:49:13,606 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:49:13,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:49:13,842 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:49:13,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f4fe016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:13, skipping insertion in model container [2024-10-14 19:49:13,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:49:13,844 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:49:13,845 INFO L158 Benchmark]: Toolchain (without parser) took 277.40ms. Allocated memory is still 180.4MB. Free memory was 151.5MB in the beginning and 140.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:49:13,846 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 180.4MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:49:13,846 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.59ms. Allocated memory is still 180.4MB. Free memory was 151.5MB in the beginning and 140.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:49:13,848 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 180.4MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.59ms. Allocated memory is still 180.4MB. Free memory was 151.5MB in the beginning and 140.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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/chl-node-subst.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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:49:15,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:49:15,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:49:15,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:49:15,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:49:15,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:49:15,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:49:15,927 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:49:15,928 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:49:15,928 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:49:15,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:49:15,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:49:15,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:49:15,930 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:49:15,932 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:49:15,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:49:15,932 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:49:15,933 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:49:15,933 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:49:15,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:49:15,933 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:49:15,937 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:49:15,938 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:49:15,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:49:15,938 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:49:15,938 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:49:15,938 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:49:15,939 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:49:15,939 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:49:15,939 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:49:15,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:49:15,939 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:49:15,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:49:15,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:49:15,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:49:15,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:49:15,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:49:15,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:49:15,941 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:49:15,941 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:49:15,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:49:15,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:49:15,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:49:15,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:49:15,944 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:49:15,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-10-14 19:49:16,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:49:16,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:49:16,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:49:16,298 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:49:16,300 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:49:16,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-14 19:49:17,974 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:49:18,187 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:49:18,188 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-14 19:49:18,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6d0b5d5e/9a5938684fd44d21b6a9195b097c7c21/FLAGb98f487cf [2024-10-14 19:49:18,219 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6d0b5d5e/9a5938684fd44d21b6a9195b097c7c21 [2024-10-14 19:49:18,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:49:18,224 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:49:18,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:49:18,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:49:18,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:49:18,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300e8296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18, skipping insertion in model container [2024-10-14 19:49:18,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:49:18,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:49:18,534 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:49:18,542 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:49:18,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:49:18,585 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:49:18,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:49:18,650 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:49:18,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18 WrapperNode [2024-10-14 19:49:18,650 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:49:18,651 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:49:18,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:49:18,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:49:18,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,724 INFO L138 Inliner]: procedures = 28, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 408 [2024-10-14 19:49:18,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:49:18,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:49:18,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:49:18,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:49:18,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,757 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,795 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-10-14 19:49:18,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:49:18,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:49:18,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:49:18,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:49:18,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (1/1) ... [2024-10-14 19:49:18,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:49:18,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:49:18,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:49:18,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:49:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:49:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:49:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:49:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-10-14 19:49:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:49:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:49:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:49:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:49:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:49:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:49:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:49:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:49:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:49:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-10-14 19:49:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-10-14 19:49:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-10-14 19:49:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:49:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:49:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-10-14 19:49:18,918 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:49:19,095 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:49:19,097 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:49:20,046 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:49:20,047 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:49:20,483 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:49:20,484 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:49:20,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:49:20 BoogieIcfgContainer [2024-10-14 19:49:20,484 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:49:20,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:49:20,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:49:20,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:49:20,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:49:18" (1/3) ... [2024-10-14 19:49:20,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392ac815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:49:20, skipping insertion in model container [2024-10-14 19:49:20,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:49:18" (2/3) ... [2024-10-14 19:49:20,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392ac815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:49:20, skipping insertion in model container [2024-10-14 19:49:20,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:49:20" (3/3) ... [2024-10-14 19:49:20,494 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2024-10-14 19:49:20,510 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:49:20,511 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-10-14 19:49:20,511 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:49:20,612 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:49:20,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-10-14 19:49:20,693 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-10-14 19:49:20,693 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:49:20,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 407 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-10-14 19:49:20,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-10-14 19:49:20,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-10-14 19:49:20,710 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:49:20,717 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;@466a270a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:49:20,718 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-10-14 19:49:20,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:49:20,721 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:49:20,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:49:20,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:20,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:49:20,722 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:20,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1292102, now seen corresponding path program 1 times [2024-10-14 19:49:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:20,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710961433] [2024-10-14 19:49:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:20,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:20,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:20,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:49:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:20,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:49:20,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:20,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:49:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:20,911 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:20,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710961433] [2024-10-14 19:49:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710961433] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:20,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:49:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772849760] [2024-10-14 19:49:20,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:20,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:49:20,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:20,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:49:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:49:21,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:21,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:21,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:22,054 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-10-14 19:49:22,054 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-14 19:49:22,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3715 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-10-14 19:49:22,129 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-10-14 19:49:22,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-10-14 19:49:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:49:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:49:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-10-14 19:49:22,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-10-14 19:49:22,142 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-10-14 19:49:22,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-10-14 19:49:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:49:22,156 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-10-14 19:49:22,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-10-14 19:49:22,162 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-10-14 19:49:22,163 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-10-14 19:49:22,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:22,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:22,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:49:22,170 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 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:49:22,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:22,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:22,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1292103, now seen corresponding path program 1 times [2024-10-14 19:49:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048800897] [2024-10-14 19:49:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:22,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:22,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:49:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:22,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:49:22,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:22,509 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 19:49:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:22,598 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:22,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:22,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048800897] [2024-10-14 19:49:22,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048800897] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:22,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:49:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803401481] [2024-10-14 19:49:22,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:22,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:49:22,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:49:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:49:22,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:22,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:22,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:23,980 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-10-14 19:49:23,980 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-14 19:49:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7857 conditions, 4841 events. 2207/4841 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39113 event pairs, 1390 based on Foata normal form. 0/3719 useless extension candidates. Maximal degree in co-relation 7809. Up to 2955 conditions per place. [2024-10-14 19:49:24,030 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 52 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-10-14 19:49:24,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 119 transitions, 372 flow [2024-10-14 19:49:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:49:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:49:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-10-14 19:49:24,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-10-14 19:49:24,037 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 4 states and 325 transitions. [2024-10-14 19:49:24,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 119 transitions, 372 flow [2024-10-14 19:49:24,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 119 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:49:24,045 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 298 flow [2024-10-14 19:49:24,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-10-14 19:49:24,047 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-10-14 19:49:24,047 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 298 flow [2024-10-14 19:49:24,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:24,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:24,048 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:49:24,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:49:24,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:24,249 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:24,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1241752825, now seen corresponding path program 1 times [2024-10-14 19:49:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:24,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225563945] [2024-10-14 19:49:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:24,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:24,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:49:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:24,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:49:24,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:24,359 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 19:49:24,518 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 19:49:24,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:24,788 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 19:49:24,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:24,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225563945] [2024-10-14 19:49:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225563945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:24,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:49:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801410139] [2024-10-14 19:49:24,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:24,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:49:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:49:24,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:49:26,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:26,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 298 flow. Second operand has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:26,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:26,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:26,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:27,975 INFO L124 PetriNetUnfolderBase]: 2216/4868 cut-off events. [2024-10-14 19:49:27,975 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-14 19:49:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 4868 events. 2216/4868 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39238 event pairs, 1390 based on Foata normal form. 0/3745 useless extension candidates. Maximal degree in co-relation 7822. Up to 2958 conditions per place. [2024-10-14 19:49:28,014 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 52 selfloop transitions, 36 changer transitions 0/146 dead transitions. [2024-10-14 19:49:28,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 590 flow [2024-10-14 19:49:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:49:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:49:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 747 transitions. [2024-10-14 19:49:28,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6225 [2024-10-14 19:49:28,019 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 298 flow. Second operand 10 states and 747 transitions. [2024-10-14 19:49:28,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 590 flow [2024-10-14 19:49:28,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 590 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:49:28,024 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 538 flow [2024-10-14 19:49:28,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=538, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-10-14 19:49:28,025 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-10-14 19:49:28,025 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 538 flow [2024-10-14 19:49:28,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:28,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:28,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:28,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-14 19:49:28,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:28,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:28,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 506332438, now seen corresponding path program 1 times [2024-10-14 19:49:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:28,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116397358] [2024-10-14 19:49:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:28,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:28,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:28,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:49:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:28,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:49:28,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:28,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:49:28,423 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 19:49:28,424 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:28,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:28,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116397358] [2024-10-14 19:49:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116397358] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:49:28,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573972638] [2024-10-14 19:49:28,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:28,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:49:28,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:49:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:49:28,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 538 flow. Second operand has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:28,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:29,739 INFO L124 PetriNetUnfolderBase]: 2217/4872 cut-off events. [2024-10-14 19:49:29,739 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-14 19:49:29,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8041 conditions, 4872 events. 2217/4872 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39256 event pairs, 1390 based on Foata normal form. 0/3754 useless extension candidates. Maximal degree in co-relation 7954. Up to 2985 conditions per place. [2024-10-14 19:49:29,772 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 82 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-10-14 19:49:29,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 149 transitions, 726 flow [2024-10-14 19:49:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:49:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:49:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2024-10-14 19:49:29,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-10-14 19:49:29,775 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 538 flow. Second operand 5 states and 382 transitions. [2024-10-14 19:49:29,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 149 transitions, 726 flow [2024-10-14 19:49:29,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 149 transitions, 643 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-10-14 19:49:29,783 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 496 flow [2024-10-14 19:49:29,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-10-14 19:49:29,785 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 9 predicate places. [2024-10-14 19:49:29,785 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 496 flow [2024-10-14 19:49:29,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:29,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:29,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:29,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:49:29,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:29,988 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:29,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 506332437, now seen corresponding path program 1 times [2024-10-14 19:49:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989418884] [2024-10-14 19:49:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:29,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:29,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:49:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:30,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:49:30,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:30,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:49:30,101 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 19:49:30,101 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:30,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989418884] [2024-10-14 19:49:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989418884] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:30,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:49:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775144631] [2024-10-14 19:49:30,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:30,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:49:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:49:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:49:30,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:30,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:30,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:30,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:30,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:30,771 INFO L124 PetriNetUnfolderBase]: 2217/4868 cut-off events. [2024-10-14 19:49:30,771 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-14 19:49:30,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8012 conditions, 4868 events. 2217/4868 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39227 event pairs, 1390 based on Foata normal form. 2/3755 useless extension candidates. Maximal degree in co-relation 7983. Up to 2973 conditions per place. [2024-10-14 19:49:30,807 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 82 selfloop transitions, 6 changer transitions 0/146 dead transitions. [2024-10-14 19:49:30,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 666 flow [2024-10-14 19:49:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:49:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:49:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-10-14 19:49:30,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-10-14 19:49:30,809 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 496 flow. Second operand 3 states and 248 transitions. [2024-10-14 19:49:30,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 666 flow [2024-10-14 19:49:30,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 146 transitions, 657 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:49:30,813 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 493 flow [2024-10-14 19:49:30,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=493, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-10-14 19:49:30,814 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 6 predicate places. [2024-10-14 19:49:30,814 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 493 flow [2024-10-14 19:49:30,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:30,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:30,815 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:30,822 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 19:49:31,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:31,019 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:31,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1483561447, now seen corresponding path program 1 times [2024-10-14 19:49:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882164252] [2024-10-14 19:49:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:31,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:31,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:31,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:31,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:49:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:31,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:49:31,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:31,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:49:31,198 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 19:49:31,198 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:31,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882164252] [2024-10-14 19:49:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882164252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:31,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:31,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:49:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115034367] [2024-10-14 19:49:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:31,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:49:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:49:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:49:31,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:31,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:31,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:31,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:31,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:32,208 INFO L124 PetriNetUnfolderBase]: 2218/4871 cut-off events. [2024-10-14 19:49:32,208 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-14 19:49:32,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8024 conditions, 4871 events. 2218/4871 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39306 event pairs, 1390 based on Foata normal form. 0/3753 useless extension candidates. Maximal degree in co-relation 7995. Up to 2980 conditions per place. [2024-10-14 19:49:32,247 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 85 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-10-14 19:49:32,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 687 flow [2024-10-14 19:49:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:49:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:49:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2024-10-14 19:49:32,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-10-14 19:49:32,249 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 493 flow. Second operand 5 states and 382 transitions. [2024-10-14 19:49:32,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 687 flow [2024-10-14 19:49:32,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 675 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:49:32,253 INFO L231 Difference]: Finished difference. Result has 124 places, 149 transitions, 519 flow [2024-10-14 19:49:32,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=124, PETRI_TRANSITIONS=149} [2024-10-14 19:49:32,254 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2024-10-14 19:49:32,254 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 149 transitions, 519 flow [2024-10-14 19:49:32,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:32,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:32,255 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:32,260 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 (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:49:32,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:32,456 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:32,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1254212453, now seen corresponding path program 1 times [2024-10-14 19:49:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688306456] [2024-10-14 19:49:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:32,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:32,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:32,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:32,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:49:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:32,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:49:32,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:32,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:49:32,712 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 19:49:32,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:33,046 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 19:49:33,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688306456] [2024-10-14 19:49:33,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688306456] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:33,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:33,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:49:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811741855] [2024-10-14 19:49:33,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:33,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 19:49:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 19:49:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-14 19:49:34,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:34,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 149 transitions, 519 flow. Second operand has 11 states, 11 states have (on average 66.81818181818181) internal successors, (735), 11 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:34,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:34,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:34,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:36,411 INFO L124 PetriNetUnfolderBase]: 2224/4889 cut-off events. [2024-10-14 19:49:36,411 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-10-14 19:49:36,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8087 conditions, 4889 events. 2224/4889 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39368 event pairs, 1390 based on Foata normal form. 0/3770 useless extension candidates. Maximal degree in co-relation 8046. Up to 2986 conditions per place. [2024-10-14 19:49:36,454 INFO L140 encePairwiseOnDemand]: 106/120 looper letters, 82 selfloop transitions, 30 changer transitions 0/167 dead transitions. [2024-10-14 19:49:36,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 812 flow [2024-10-14 19:49:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:49:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:49:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 798 transitions. [2024-10-14 19:49:36,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6045454545454545 [2024-10-14 19:49:36,459 INFO L175 Difference]: Start difference. First operand has 124 places, 149 transitions, 519 flow. Second operand 11 states and 798 transitions. [2024-10-14 19:49:36,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 812 flow [2024-10-14 19:49:36,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 797 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:49:36,464 INFO L231 Difference]: Finished difference. Result has 136 places, 167 transitions, 684 flow [2024-10-14 19:49:36,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=684, PETRI_PLACES=136, PETRI_TRANSITIONS=167} [2024-10-14 19:49:36,466 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2024-10-14 19:49:36,466 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 684 flow [2024-10-14 19:49:36,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.81818181818181) internal successors, (735), 11 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:36,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:36,467 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:49:36,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:49:36,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:36,669 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:36,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1867256591, now seen corresponding path program 2 times [2024-10-14 19:49:36,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653171630] [2024-10-14 19:49:36,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:49:36,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:36,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:36,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:49:36,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:49:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:49:36,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:49:36,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:36,795 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 19:49:37,038 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 19:49:37,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:37,559 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 19:49:37,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653171630] [2024-10-14 19:49:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653171630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:37,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:37,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:49:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957139027] [2024-10-14 19:49:37,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:37,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:49:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:49:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:49:39,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:49:39,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 167 transitions, 684 flow. Second operand has 14 states, 14 states have (on average 66.57142857142857) internal successors, (932), 14 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:39,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:39,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:49:39,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:46,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:49:53,724 INFO L124 PetriNetUnfolderBase]: 2242/4943 cut-off events. [2024-10-14 19:49:53,725 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-10-14 19:49:53,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8346 conditions, 4943 events. 2242/4943 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39899 event pairs, 1390 based on Foata normal form. 18/3836 useless extension candidates. Maximal degree in co-relation 8290. Up to 2988 conditions per place. [2024-10-14 19:49:53,761 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 76 selfloop transitions, 90 changer transitions 0/221 dead transitions. [2024-10-14 19:49:53,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 1304 flow [2024-10-14 19:49:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:49:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:49:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1590 transitions. [2024-10-14 19:49:53,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-10-14 19:49:53,768 INFO L175 Difference]: Start difference. First operand has 136 places, 167 transitions, 684 flow. Second operand 22 states and 1590 transitions. [2024-10-14 19:49:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 221 transitions, 1304 flow [2024-10-14 19:49:53,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 221 transitions, 1247 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-10-14 19:49:53,778 INFO L231 Difference]: Finished difference. Result has 159 places, 221 transitions, 1181 flow [2024-10-14 19:49:53,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1181, PETRI_PLACES=159, PETRI_TRANSITIONS=221} [2024-10-14 19:49:53,781 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 45 predicate places. [2024-10-14 19:49:53,781 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 221 transitions, 1181 flow [2024-10-14 19:49:53,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 66.57142857142857) internal successors, (932), 14 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:53,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:53,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:53,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:49:53,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:53,985 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:53,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1563952764, now seen corresponding path program 1 times [2024-10-14 19:49:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:53,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370685442] [2024-10-14 19:49:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:53,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:53,990 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:53,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:49:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:54,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:49:54,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:54,220 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 19:49:54,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:54,310 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 19:49:54,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370685442] [2024-10-14 19:49:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370685442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:54,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:49:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44083329] [2024-10-14 19:49:54,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:54,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:49:54,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:49:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:49:54,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-14 19:49:54,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 221 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:54,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:54,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-14 19:49:54,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:56,017 INFO L124 PetriNetUnfolderBase]: 4461/9802 cut-off events. [2024-10-14 19:49:56,018 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-10-14 19:49:56,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16645 conditions, 9802 events. 4461/9802 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 88669 event pairs, 2784 based on Foata normal form. 2/7681 useless extension candidates. Maximal degree in co-relation 16550. Up to 3023 conditions per place. [2024-10-14 19:49:56,087 INFO L140 encePairwiseOnDemand]: 109/120 looper letters, 223 selfloop transitions, 68 changer transitions 0/349 dead transitions. [2024-10-14 19:49:56,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 349 transitions, 2497 flow [2024-10-14 19:49:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:49:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:49:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 718 transitions. [2024-10-14 19:49:56,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6648148148148149 [2024-10-14 19:49:56,090 INFO L175 Difference]: Start difference. First operand has 159 places, 221 transitions, 1181 flow. Second operand 9 states and 718 transitions. [2024-10-14 19:49:56,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 349 transitions, 2497 flow [2024-10-14 19:49:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 349 transitions, 2113 flow, removed 114 selfloop flow, removed 9 redundant places. [2024-10-14 19:49:56,102 INFO L231 Difference]: Finished difference. Result has 158 places, 252 transitions, 1265 flow [2024-10-14 19:49:56,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=158, PETRI_TRANSITIONS=252} [2024-10-14 19:49:56,103 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 44 predicate places. [2024-10-14 19:49:56,103 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 252 transitions, 1265 flow [2024-10-14 19:49:56,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:56,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:56,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:56,109 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 19:49:56,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:56,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:56,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash -945424301, now seen corresponding path program 1 times [2024-10-14 19:49:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502271101] [2024-10-14 19:49:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:56,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:56,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:56,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:56,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:49:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:56,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:49:56,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:49:56,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:49:56,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:56,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502271101] [2024-10-14 19:49:56,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502271101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:49:56,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:49:56,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:49:56,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131172326] [2024-10-14 19:49:56,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:49:56,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:49:56,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:49:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:49:56,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-14 19:49:56,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 252 transitions, 1265 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:56,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:56,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-14 19:49:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:57,623 INFO L124 PetriNetUnfolderBase]: 4469/9848 cut-off events. [2024-10-14 19:49:57,623 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-10-14 19:49:57,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 9848 events. 4469/9848 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 89209 event pairs, 2780 based on Foata normal form. 2/7627 useless extension candidates. Maximal degree in co-relation 16465. Up to 6063 conditions per place. [2024-10-14 19:49:57,674 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 178 selfloop transitions, 14 changer transitions 0/250 dead transitions. [2024-10-14 19:49:57,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 250 transitions, 1631 flow [2024-10-14 19:49:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:49:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:49:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-10-14 19:49:57,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-10-14 19:49:57,676 INFO L175 Difference]: Start difference. First operand has 158 places, 252 transitions, 1265 flow. Second operand 4 states and 327 transitions. [2024-10-14 19:49:57,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 250 transitions, 1631 flow [2024-10-14 19:49:57,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 250 transitions, 1630 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:49:57,685 INFO L231 Difference]: Finished difference. Result has 160 places, 250 transitions, 1274 flow [2024-10-14 19:49:57,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1274, PETRI_PLACES=160, PETRI_TRANSITIONS=250} [2024-10-14 19:49:57,686 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 46 predicate places. [2024-10-14 19:49:57,686 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 250 transitions, 1274 flow [2024-10-14 19:49:57,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:57,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:57,686 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:57,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:49:57,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:57,887 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:49:57,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -378259573, now seen corresponding path program 1 times [2024-10-14 19:49:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072985380] [2024-10-14 19:49:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:57,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:57,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:57,891 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:49:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:58,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:49:58,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:49:58,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:49:58,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072985380] [2024-10-14 19:49:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072985380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:58,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:58,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-14 19:49:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742507786] [2024-10-14 19:49:58,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:58,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:49:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:49:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:49:58,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-14 19:49:58,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 250 transitions, 1274 flow. Second operand has 12 states, 12 states have (on average 70.25) internal successors, (843), 12 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:58,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:58,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-14 19:49:58,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:50:00,792 INFO L124 PetriNetUnfolderBase]: 8861/19428 cut-off events. [2024-10-14 19:50:00,792 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-10-14 19:50:00,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32340 conditions, 19428 events. 8861/19428 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 195816 event pairs, 5568 based on Foata normal form. 4/15195 useless extension candidates. Maximal degree in co-relation 32170. Up to 6005 conditions per place. [2024-10-14 19:50:00,907 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 170 selfloop transitions, 104 changer transitions 0/332 dead transitions. [2024-10-14 19:50:00,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 332 transitions, 2258 flow [2024-10-14 19:50:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:50:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:50:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 712 transitions. [2024-10-14 19:50:00,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-10-14 19:50:00,909 INFO L175 Difference]: Start difference. First operand has 160 places, 250 transitions, 1274 flow. Second operand 9 states and 712 transitions. [2024-10-14 19:50:00,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 332 transitions, 2258 flow [2024-10-14 19:50:00,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 332 transitions, 2244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:50:00,923 INFO L231 Difference]: Finished difference. Result has 166 places, 293 transitions, 1788 flow [2024-10-14 19:50:00,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1788, PETRI_PLACES=166, PETRI_TRANSITIONS=293} [2024-10-14 19:50:00,924 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 52 predicate places. [2024-10-14 19:50:00,924 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 293 transitions, 1788 flow [2024-10-14 19:50:00,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.25) internal successors, (843), 12 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:00,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:50:00,925 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:50:00,931 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 19:50:01,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:01,130 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:50:01,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:50:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1149697714, now seen corresponding path program 1 times [2024-10-14 19:50:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:50:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83923230] [2024-10-14 19:50:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:50:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:50:01,132 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:50:01,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:50:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:50:01,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:50:01,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:50:01,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:50:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:50:01,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:50:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:50:01,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:50:01,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83923230] [2024-10-14 19:50:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83923230] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:50:01,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:50:01,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2024-10-14 19:50:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586049062] [2024-10-14 19:50:01,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:50:01,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 19:50:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:50:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 19:50:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-14 19:50:02,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:50:02,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 293 transitions, 1788 flow. Second operand has 11 states, 11 states have (on average 67.81818181818181) internal successors, (746), 11 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:02,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:50:02,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:50:02,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:50:08,889 INFO L124 PetriNetUnfolderBase]: 8901/19584 cut-off events. [2024-10-14 19:50:08,889 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2024-10-14 19:50:08,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32920 conditions, 19584 events. 8901/19584 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 198118 event pairs, 5560 based on Foata normal form. 20/15163 useless extension candidates. Maximal degree in co-relation 32748. Up to 11912 conditions per place. [2024-10-14 19:50:09,003 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 147 selfloop transitions, 140 changer transitions 0/342 dead transitions. [2024-10-14 19:50:09,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 342 transitions, 2814 flow [2024-10-14 19:50:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 19:50:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 19:50:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1067 transitions. [2024-10-14 19:50:09,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5927777777777777 [2024-10-14 19:50:09,007 INFO L175 Difference]: Start difference. First operand has 166 places, 293 transitions, 1788 flow. Second operand 15 states and 1067 transitions. [2024-10-14 19:50:09,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 342 transitions, 2814 flow [2024-10-14 19:50:09,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 342 transitions, 2799 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:50:09,021 INFO L231 Difference]: Finished difference. Result has 183 places, 342 transitions, 2657 flow [2024-10-14 19:50:09,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2657, PETRI_PLACES=183, PETRI_TRANSITIONS=342} [2024-10-14 19:50:09,023 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 69 predicate places. [2024-10-14 19:50:09,023 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 342 transitions, 2657 flow [2024-10-14 19:50:09,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.81818181818181) internal successors, (746), 11 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:09,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:50:09,023 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 19:50:09,030 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 19:50:09,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:09,224 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:50:09,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:50:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1362457411, now seen corresponding path program 1 times [2024-10-14 19:50:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:50:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285942918] [2024-10-14 19:50:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:50:09,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:50:09,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:50:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:50:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:50:09,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:50:09,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:50:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:50:09,380 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:50:09,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:50:09,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285942918] [2024-10-14 19:50:09,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285942918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:50:09,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:50:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:50:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002615072] [2024-10-14 19:50:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:50:09,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:50:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:50:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:50:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:50:09,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-14 19:50:09,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 342 transitions, 2657 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:09,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:50:09,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-14 19:50:09,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:50:11,747 INFO L124 PetriNetUnfolderBase]: 8899/19582 cut-off events. [2024-10-14 19:50:11,747 INFO L125 PetriNetUnfolderBase]: For 668/668 co-relation queries the response was YES. [2024-10-14 19:50:11,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33164 conditions, 19582 events. 8899/19582 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 198012 event pairs, 5560 based on Foata normal form. 2/15144 useless extension candidates. Maximal degree in co-relation 32986. Up to 12055 conditions per place. [2024-10-14 19:50:11,866 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 270 selfloop transitions, 13 changer transitions 0/341 dead transitions. [2024-10-14 19:50:11,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 341 transitions, 3217 flow [2024-10-14 19:50:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:50:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:50:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-10-14 19:50:11,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-10-14 19:50:11,869 INFO L175 Difference]: Start difference. First operand has 183 places, 342 transitions, 2657 flow. Second operand 4 states and 327 transitions. [2024-10-14 19:50:11,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 341 transitions, 3217 flow [2024-10-14 19:50:11,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 341 transitions, 3015 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-10-14 19:50:11,884 INFO L231 Difference]: Finished difference. Result has 181 places, 341 transitions, 2475 flow [2024-10-14 19:50:11,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2475, PETRI_PLACES=181, PETRI_TRANSITIONS=341} [2024-10-14 19:50:11,886 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 67 predicate places. [2024-10-14 19:50:11,886 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 341 transitions, 2475 flow [2024-10-14 19:50:11,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:11,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:50:11,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:50:11,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 19:50:12,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:12,088 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:50:12,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:50:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -518592336, now seen corresponding path program 1 times [2024-10-14 19:50:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:50:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530530933] [2024-10-14 19:50:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:50:12,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:50:12,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:50:12,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:50:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:50:12,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:50:12,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:50:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:50:12,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:50:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:50:12,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:50:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530530933] [2024-10-14 19:50:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530530933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:50:12,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:50:12,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-14 19:50:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264533458] [2024-10-14 19:50:12,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:50:12,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:50:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:50:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:50:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:50:12,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-14 19:50:12,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 341 transitions, 2475 flow. Second operand has 12 states, 12 states have (on average 70.66666666666667) internal successors, (848), 12 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:12,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:50:12,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-14 19:50:12,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:50:17,567 INFO L124 PetriNetUnfolderBase]: 17719/38864 cut-off events. [2024-10-14 19:50:17,567 INFO L125 PetriNetUnfolderBase]: For 1016/1016 co-relation queries the response was YES. [2024-10-14 19:50:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65368 conditions, 38864 events. 17719/38864 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 1986. Compared 432628 event pairs, 11136 based on Foata normal form. 8/30400 useless extension candidates. Maximal degree in co-relation 65131. Up to 11919 conditions per place. [2024-10-14 19:50:17,931 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 235 selfloop transitions, 262 changer transitions 0/555 dead transitions. [2024-10-14 19:50:17,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 555 transitions, 5349 flow [2024-10-14 19:50:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:50:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:50:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 715 transitions. [2024-10-14 19:50:17,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-10-14 19:50:17,934 INFO L175 Difference]: Start difference. First operand has 181 places, 341 transitions, 2475 flow. Second operand 9 states and 715 transitions. [2024-10-14 19:50:17,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 555 transitions, 5349 flow [2024-10-14 19:50:17,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 555 transitions, 5348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:50:17,957 INFO L231 Difference]: Finished difference. Result has 188 places, 463 transitions, 4324 flow [2024-10-14 19:50:17,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4324, PETRI_PLACES=188, PETRI_TRANSITIONS=463} [2024-10-14 19:50:17,958 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 74 predicate places. [2024-10-14 19:50:17,958 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 463 transitions, 4324 flow [2024-10-14 19:50:17,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.66666666666667) internal successors, (848), 12 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:17,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:50:17,959 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:50:17,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 19:50:18,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:18,160 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-14 19:50:18,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:50:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1565297033, now seen corresponding path program 1 times [2024-10-14 19:50:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:50:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371926170] [2024-10-14 19:50:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:50:18,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:50:18,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:50:18,162 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:50:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:50:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:50:18,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:50:18,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:50:18,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 19:50:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:50:18,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:50:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:50:19,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:50:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371926170] [2024-10-14 19:50:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371926170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:50:19,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:50:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-10-14 19:50:19,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211066523] [2024-10-14 19:50:19,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:50:19,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 19:50:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:50:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 19:50:19,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-14 19:50:22,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-14 19:50:22,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 463 transitions, 4324 flow. Second operand has 15 states, 15 states have (on average 67.66666666666667) internal successors, (1015), 15 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:50:22,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:50:22,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-14 19:50:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:50:41,057 INFO L124 PetriNetUnfolderBase]: 17823/39248 cut-off events. [2024-10-14 19:50:41,057 INFO L125 PetriNetUnfolderBase]: For 1395/1395 co-relation queries the response was YES. [2024-10-14 19:50:41,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67085 conditions, 39248 events. 17823/39248 cut-off events. For 1395/1395 co-relation queries the response was YES. Maximal size of possible extension queue 1982. Compared 438087 event pairs, 11120 based on Foata normal form. 64/30432 useless extension candidates. Maximal degree in co-relation 66847. Up to 23785 conditions per place.